Melting point potassium alum. The melting point of potassium alum is 92.

Melting point potassium alum Compare elements - Aluminium and Potassium comparison table side by side across over 90 properties. 0 percent and not more than 100. Learn the chemistry behind potash alum, fitkari, and more for exams and practicals. Learn to synthesize alum with this lab guide. 298 (1), 3. The yield from aluminum foil was 15. BACKGROUND This lab makes use of a number of important wet chemistry synthesis techniques. a. Commercially available potassium aluminum sulfate is called potassium alum, potash alum, alum flour, or alum meal. 725 gm/cm 3. ) Potassium Uses Figure 2. This salt is sourced from Alum 1. It is used to harden Gelatin, Plaster, and cement. 76 Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3 X Ray Diffraction: By Intensity (I/I o): 4. Records of potassium salt use can be traced back to ancient Rome. Study with Quizlet and memorize flashcards containing terms like Which of the following compounds would have have the lowest melting point? •aluminum oxide •potassium chloride •sucrose •sodium chloride, Which of the following statements explains why ionic compounds are brittle?, How does dissolving an ionic compounds in water increase electrical conductivity? and more. [2] In modern times, the biggest use of potassium is for fertiliser. Apr 29, 2025 · - Melting Point: The hydrated form of potassium alum melts at around 92. Lab experiment detailing potassium alum synthesis, melting point determination, and hydration calculation. Aluminium potassium Discover alum’s formula, types, and uses in water purification, medicine, and industry. 8 g of product was obtained. Alum is widely used in industries as well as medical purposes. Make it an unknown! Give students the name of the compound they are analyzing, but do not reveal the structure. Feb 4, 2020 · Synthesis of Aluminum Sulfate Dodecahydrate (Alum) INTRODUCTION In this experiment, we will Synthesize Potassium Aluminum Sulfate dodecahydrate, crystallize the compound, and test for purity, using a melting point measurement. [2] Many popular Synthesis of Aluminum Sulfate Dodecahydrate (Alum) INTRODUCTION In this experiment, we will Synthesize Potassium Aluminum Sulfate dodecahydrate, crystallize the compound, and test for purity, using a melting point measurement. This article summarizes key chemical and thermal properties of this chemical element and atom. 0 What is Alum? Alum refers to a class of chemical compounds known as double sulfates containing aluminum, along with a monovalent cation (like potassium, sodium, or ammonium), and another trivalent metal (like iron or chromium). Packaging and storage— Preserve in tight containers, and store at room temperature. Question: 6. Aug 21, 2025 · Chemsrc provides Aluminum potassium sulfate 12-hydrate (CAS#:7784-24-9) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. ALUMINIUM POTASSIUM SULPHATE DODECAHYDRATE, 7784-24-9, Inorganic Salts, AIK (SO4)2. Molecular Weight 474. The relative density is about 1. 5°c. Potassium alum, also known as potassium aluminium sulfate, is a chemical substance that is the double sulfate of potassium and aluminum, having the formula KAl (SO 4) 2. Aluminium potassium sulfate dodecahydrate Section 1 Chemical Product and Company Identification Section 2 Composition, Information on Ingredients CAS# Chemical Name: % EINECS# 7784 24 9 Aluminium potassium sulfate dodecahydrate >98% unlisted Hazard Symbols: XN Apr 11, 2014 · A student research and analysis report on the the synthesis of Alum. The substances exhibit an acidic reaction, resulting in the formation of litmus. 6. What is a melting point? The melting point of a substance is the temperature at which it changes state from solid to liquid at atmospheric pressure; at the melting point, the solid and liquid phases exist in equilibrium. Occurs in nature as alum-(K), kalinite, alunite and steklite minerals. 5°C. Jun 14, 2022 · 6. Feb 15, 2022 · Alum Crystals Composition Alum is a common name that is used to refer to potassium aluminum sulfate, as well as other aluminum sulfate compounds like chrome alum. Potash Alum - KAl (SO4)2 x 12H2O Classification: Alum Atomic numbers: 19, 13, 16, 8 & 1 Atomic weight: 333. 35 g (76%) and aluminum scrap was 12. Apr 18, 2024 · When heated beyond its melting point, potassium alum undergoes dehydration, transforming into calcined alum (alum ustum), represented as KAl (SO 4) 2. The melting point (or, rarely, liquefaction point) of metals is the temperature at which a substance changes state from solid to liquid at atmospheric pressure. What if the observed melting point of the potassium alum is “way off”? As you know the melting point of the pure alum, you can use the difference in melting point to define the melting point of your sample. Aluminum Melting Point, Steel Melting Point, Gold Melting Temperature Potassium alum can also be chemically synthesized from aluminum metal (used in daily life as tinfoil or beverage cans!) by first reacting the metal with potassium hydroxide (KOH). Properties Like its potassium analog, sodium aluminum sulfate crystallizes as the dodecahydrate in the classical cubic alum structure. Mar 15, 2015 · Potassium alum crystals are colored electrolytically below 100°C and under various voltages using a pointed cathode and a flat anode. Ammonium aluminium sulfate, also known as ammonium alum or just alum (though there are many different substances also called "alum"), is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH 4)Al (SO 4) 2 ·12H 2 O. 2) Hazard Identification Aluminium Ammonium Sulphate Aluminium Potassium Sulphate, Alum, Potash Alum, Potassium Aluminium Sulphate dodecahydrate, Potassium Alum. 45), Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/off H - Help Screen I - Data Info A Alum- (K) Crystallography Cell Dimensions: a = 12. Synonyms: Alum, Potassium alum, Potassium aluminum sulfate dodecahydrate. 12H2OAluminum potassium disulfate dodecahydrateAluminum potassium sulfate dodecahydrateKalinitePotash alum dodecahydratePotassium alum dodecahydratePotassium aluminum disulfate dodecahydrate In the list of most abundant element Potassium is ranked 7th. Determine melting point, water of hydration, and sulfate content. It has antiseptic property and is used after shave. Apr 29, 2025 · Potassium Alum (CAS 7784-24-9) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook. It is also commonly referred to as ‘fitkari. Potassium can easily be sliced (chopped) down using knife. Part 2 1. Scientists often use databases and academic Lab experiment analyzing alum (aluminum potassium sulfate) via melting point and water of hydration. Alum- (K) Crystallography Cell Dimensions: a = 12. Also, most spectroscopic methods would not yield useful information. ), calculate the moles of anhydrous alum in the original sample. Aluminum’s abundance percentage is more as it is found in more than 260 minerals. It is commonly called alumina and may also be called aloxide, aloxite, ALOX or alundum in various forms and applications and alumina is refined from bauxite. com. However, the name "alum" is more commonly and properly used for any double sulfate salt with the generic formula XAl (SO4)2·12H2O, where X is a monovalent cation such as potassium or ammonium. The potassium aluminum fluoride (KAlF4) flux agent may also allow for faster brazing of standard alloys. The melting point, mole ratio of hydrated water to anhydrous aluminum potassium sulfate, and percent of sulfate ions contained in the Ataman KimyaCAS Number : 10043-67-1 / 7784-24-9 Aluminium potassium sulfate = Potassium alum = Potassium alum sulfate Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound: the double sulfate of potassium and aluminium, with chemical formula KAl (SO4)2. This paper explores the synthesis, characterization, and diverse applications of potash alum, with particular emphasis on its role as a coagulant in wastewater treatment . These similarities and dissimilarities ChemSpider record containing structure, synonyms, properties, vendors and database links for aluminium potassium sulfate, 10043-67-1, GRLPQNLYRHEGIJ-UHFFFAOYSA-J We have an expert-written solution to this problem! Know about part one of the alum lab--melting point determination of alum A) pulverize alum with mortar and pestle B) pack in capillary tube and push the open end of the tube down into a small pile of alum powder C) pack alum tightly at closed end of capillary tube and turn tube so open end is up Our potassium fluoroaluminate is approved and used by leading brazing companies globally. (Note: Some reference books call alum "aluminum potassium sulfate dodecahydrate" instead of "potassium aluminum sulfate dodecahydrate". 76 Refractive index (n=): 1. So that you don't have to overheat the aluminum to get it to work. Buy at competitive price & lead time. ) Boiling Point 200°C Density 1. Potash alum is a chemical compound widely used as the potassium sulfate dodecahydrate. These similarities and dissimilarities The aluminum hydroxide precipitates from solution as a solid and excess potassium hydroxide, KOH, is neutralized to potassium sulfate After adding the acid the solution may need to be heated Jun 19, 2016 · The compound with the lowest melting point among the options is sucrose, as it is a molecular compound with weaker intermolecular forces compared to the ionic compounds like sodium chloride, potassium chloride, and aluminum oxide, which all have significantly higher melting points. 5 ° C Based on your experimental melting point, does your sample consist of pure potassium alum? Explain your answer. 757 g/mL at 25 °C (lit. To illustrate, the 4. : 7784-24-9 Molecular Formula: AlH8KO5S Molecular Weight: 186. If not breathing, give artificial respiration. Customers benefit from improved brazing performance, stabilised brazing processes, increased manufacturing effi ciency and lower costs. In the lab, a student recorded the melting point of synthesized alum as a range 82-88°C. May 3, 2025 · Potassium alum is incompatible with strong oxidizing agents, aluminum, copper, steel, and zinc. Other alums are named after the 1, The melting point of Potassium Alum (KAl (SO4)2. Some examples include gun powder and dyeing processes. 94 Melting point (C): 82 Boiling point (C): Density (g/cm3): 1. Additionally, these compounds are commonly manufactured on an industrial scale through the combination of aluminum sulfate and a monovalent sulfate cation. The melting point of potassium alum is 9 2. 39 g/mol Chemical Formula: KAl (SO₄)₂ . Apr 10, 2024 · Colorless transparent block crystal or crystalline powder, odorless, slightly sweet and sour taste. Post-lab analysis involves compiling all the data and referring to academic sources to confirm the composition. In-stock for immediate delivery. 5oC. Aluminium potassium sulfate is commonly encountered as the dodecahydrate, KAl (SO4)2·12H2O. 3 94. 00 Aluminum Potassium Sulfate Dodecahydrate – 2. The density of the substance is 1. Odor Odor Threshold pH Melting point/freezing point Initial boiling point and boiling range Flash point Evaporation rate Flammability (solid, gas) : Form: powder Color: white : no data available : No data available : 3. 7 A o'f \S}m},@}s Pqussh, {m LERRAHLR By o [otedmd Wh ot kK an: 7 R FH oM R A8 bt «27 Alum - Yo TRTE L 0 BT Tt L TP = RN R An in-depth guide on Alum, a hydrated double sulfate salt of aluminium. 133, Z = 4; V = 1,786. It has been used since ancient times as a Mordant in dyeing textiles and for tawing skins. The common alum is a potash alum or potassium alum. Melting point of alum. It is often called "Fitkari. ’ Potash alum is an important Mar 16, 2025 · A white odorless powder with transparent crystals. 5 deg C); [Ullmann] The most important alums are aluminum potassium sulfate, aluminum ammonium sulfate, and aluminum sodium sulfate. 12H2O is 92. Includes procedures, calculations for yield, and melting point determination. 25 (0. 12H2O and is comprised of potassium, aluminium and sulfur. Question: Calculations and Analysis Part 1 Find the literature value for the melting point of aluminum potassium sulfate and enter this value in the Part 1 Data Table. 053 (0. It is a chemical compound that is commonly utilized as potassium sulfate dodecahydrate. It is also commonly used in the cosmetic industry for its skin-tightening and toning properties. The alum crystals were analyzed by melting point with the following results: Melting Point Analysis: Melting Point (°C) Melting Point Range (°C) Commercial Potassium 94. In a second step, sulfuric acid is added, which will form the potassium alum (KAl(SO4)2·12H2O) by Tables show melting points of various chemical substances. When heated further, it loses its water of crystallization and forms an anhydrous salt. Anhydrous 258. Rarely as tiny octahedra, which may be strung along fibers; stalactitic, columnar, mealy or granular, massive efflorescences. Aluminium sulfate is sometimes called alum or papermaker's alum in certain industries. Download SDS (PDF) Aluminum Potassium Sulfate Dodecahydrate – 500 g $ 58. Aluminum chips weighing 0. Dec 29, 2023 · Abstract The purpose of this laboratory experiment was to determine the melting point and the mole ratio of hydrated water to anhydrous aluminum, potassium, and sulfate in AlKSO 4. 12H2O by Loba Chemie, India Potassium Alum Details Chemical Name: Potassium Alum Synonyms: Aluminium Potassium Sulfate Dodecahydrate; Aluminum Potassium Sulfate, 12-Hydrate CAS No. 5 kg $ 155. It has a melting point of 92°C. First-aid measures after skin contact : Wash off with soap and plenty of water. 5 C. ) b. 43-1. Jan 22, 2025 · Inorganic compound, double salt of transitional metal aluminum, alkaline metal potassium and inorganic sulfuric acid. This double salt of potassium and aluminum, enriched with crystal water, stands out for its Aug 21, 2014 · Alum is an ionic compound, which means its melting and boiling points are likely to be too high to be measured conveniently. Molecular weight: 258. Its chief culinary use is in pickling recipes, to preserve and add crispness to fruit and vegetables. Potassium alum Potassium aluminium sulfate Other names potassium alum, potash alum Identifiers CAS number 7784-24-9 Properties Molecular formula KAl (SO4)2 Potassium alum Potassium aluminium sulfate Other names potassium alum, potash alum Identifiers CAS number 7784-24-9 Properties Molecular formula KAl (SO4)2 Crystal Data: Cubic. High School Chemistry lab manual for synthesizing and analyzing alum. This provides the potassium ions needed in alum and forms potassium aluminate (KAl(OH)4) which is soluble in water. " In this article, we learn about alum, its properties the melting point of potassium alum is 92. Potassium aluminum sulfate performed physical analysis, including analyses of pH, melting point, and Al 2O3 concentration. The chemical formula for potash alum is KAl (SO₄)₂·12H₂O, and its chemical name is potassium aluminium sulphate. Articles of Aluminum potassium sulfate 12-hydrate are included as well. in water: (20 ºC): 139 g/l - Melting point: 90 ºC - Tariff number: 2833 30 00 00 - Applications: analytical chemistry, manufacture of dyes, manufacturing of lacquers, in explosive compositions. Jun 17, 2024 · The Versatility and Benefits of Potassium Alum: The Industrial Powerhouse Introduction to Potassium Alum / Aluminum potassium sulfate / Potassium Aluminum Sulfate / Potash Alum Potassium Alum, chemically known as AlK (SO4)2·12H2O, is a remarkable compound with a wide range of industrial applications. AlK (SO4)2. To know more read this article, which focuses on facts and also explains the procedure for growing crystals of alum. Potassium alum is defined as a chemical compound with the formula KAl (SO4)2·12H2O, utilized as a coagulant to remove phosphorus, the primary cause of algae growth, and also serves as a fertilizer for plants. - Synonyms: Potassium aluminium sulfate, Alum potassium, Potassium alum - KAl (SO4)2·12H2O - M = 474,39 g/mol - CAS [7784-24-9] - EINECS-No. (Note: Some reference books call alum "aluminum potassium sulfate Abstract:- Potash alum, a double salt composed of potassium sulfate and aluminum sulfate, has long been recognized for its utility in various industrial applications, notably in water treatment, food processing, and medicine. SO3−, SO2−, O3−,… HYDRATE LAB Pre-Lab Questions: 1. Aluminum potassium sulfate dodecahydrate. The sample is a? Views: 5,307 students Updated on: Feb 16, 2025 Compare the elements Potassium and Aluminium on the basis of their properties, attributes and periodic table facts. Aluminum potassium sulfate occurs naturally in the minerals Alunite and leucite. Compare elements - Potassium and Aluminium comparison table side by side across over 90 properties. Aug 1, 2019 · Abstract Single crystal of potassium aluminum sulfate dodecahydrate (potash alum) was grown by the slow evaporation technique of supersaturated aqueous solution at room temperature. Table 4-2 Physical and Chemical Properties of Aluminum and Compounds a View in own window Chrome alum or Chromium (III) potassium sulfate is the potassium double sulfate of chromium. True or False? 2. We then measure the melting point of the alum purchased from Flinn and compare both of these measurements to the actual melting point of potassium aluminum sulfate. [3] Historically, potassium salts (primarily saltpetre, alum, and potash) were used for a variety of products and activities. First-aid measures after eye contact : Flush eyes with water as a precaution. 5 percent of AlK (SO 4) 2, calculated on the dried basis. The obtained crystal was characterized by using powder X-ray diffraction, DSC, TGA, electrical conductivity, optical transmittance and optical reflectance measurements. [1] By itself, alum often refers to potassium alum, with the formula KAl (SO 4) 2·12 H 2O. : 233-141-3 - Solub. Be sure to cite your source. 24H 2 O. [7 Jul 23, 2025 · Alum is an important inorganic compound which are double sulfates of a monovalent metal (such as potassium, sodium, or ammonium) and a trivalent metal (such as aluminum, chromium, or iron). Enter this value in the Part 2 Apr 29, 2025 · Aluminium Potassium Sulphate Dodecahydrate (CAS 7784-24-9) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook. The purpose of this experiment is to determine the formula for the hydrate alum. 5 94. To avoid a violent reaction, it is really crucial that any tools that may touch molten salt are preheated well, to drive off any residual moisture. » Potassium Alum contains not less than 99. 21 [10043-67-1]. Aluminium potassium sulfate dodecahydrate CAS 7784-24-9 for analysis EMSURE® ACS,Reag. Alum has the chemical formula KAl (SO4)2. " Explore a curated table of melting point values for different phosphates in both degrees Celsius and degrees Fahrenheit. If a value of tmax is not given, the equation should not be used to extrapolate more than about 20 C beyond the melting point. These crystals may have a slight sheen or sparkle due to their smooth surfaces and refractive properties. Crystal of potassium alum, KAl (SO 4) 2·12H 2O An alum (/ ˈæləm /) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula XAl (SO 4) 2·12 H 2O, such that X is a monovalent cation such as potassium or ammonium. Can be bought in pharmacy (as Melting point 200 C 2. Aluminium oxide (or aluminium (III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. 0 Alum Trail 1 Trial 2 94. Melting points of the elements (data page) Table In the following table, the use row is the value recommended for use in other Wikipedia pages in order to maintain consistency across content. The melting point of the substance is recorded to be 92. to prepare an alum from an aluminum can or foil, and to test the purity of the alum using a melting-point measurement Aluminium sulfate is sometimes called alum or papermaker’s alum, however, the name “alum” is more commonly and properly used for any double sulfate salt with the generic formula X Al (SO4)2·12H2O, where X is a monovalent cation such as potassium or ammonium (5). 192 g/mol. Potassium alum is a colorless, odorless, and water-soluble salt that has a molecular formula of KAl (SO4)2·12H2O 1. At elevated temperatures, SO 3 is released. Potash alum has also Aluminium potassium sulfate dodecahydrate CAS 7784-24-9 for analysis EMSURE® ACS,Reag. Includes procedures for melting point, hydration, and sulfate analysis. Apr 29, 2025 · Aluminium potassium sulfate dodecahydrate (CAS 7784-24-9) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook. Available in 5 g The compounds of greatest importance are aluminum oxide, the sulfate, and the soluble sulfate with potassium (alum). AP Chemistry Lab #2- Synthesis and Analysis of Alum (Big Idea 1 & 2) Ask a Question: How can I utilize chemical synthesis to produce potassium aluminum sulfate dodecahydrate and to quantify the identity and purity of this substance using several analytical tests? Aluminum potassium sulfate (1:1:2) dodecahydrate [7784-24-9]. 757 and the melting point is 92. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. It is a good conductor of heat and electricity and used in transmission lines. When it is dispensed in powders with phenol, salicylates, or tannic acid, gray or green colors may be developed owing to traces of iron in the alum. Potash Alum – Alum in its single form is also commonly known as potassium alum or potash alum. Two techniques were employed to achieve this goal: identifying the melting point of alum and analyzing the water of hydration in alum crystals. Using an appropriate chemistry reference book, look up and record the melting point (in °C) of potassium alum. Molar mass calculator computes molar mass, molecular weight and elemental composition of any given compound. 27 g/mol Appearance: white crystalline powder Melting point: 550°C Boiling point: 1500°C Density: 2. Analysis of Alum, AlK (SO 4 ) 2 ⋅ 12H 2 O Table of Contents: Purpose of Experiment Background Pre-Lab Data Calculations Post-Lab Purpose of Experiment: To analyze alum , AlK (SO 4 ) 2 ⋅12H2O by three techniques in order to verify the identity of alum. Boiling Point: Upon heating, potassium alum undergoes dehydration and decomposition without boiling. Aug 9, 2023 · Alum is typically found in the crystalline form, which is white and transparent. Shop Aluminum potassium sulfate dodecahydrate, 98+%, ACS reagent at Fishersci. Compare the elements Aluminium and Potassium on the basis of their properties, attributes and periodic table facts. Explore a comprehensive table of melting point values for common salts in both degrees Celsius and degrees Fahrenheit. Manufacturer of Potassium Aluminium Sulphate - Potash Alum - Potassium Aluminium Sulphate- Free Flow Powder, Potassium Aluminium Sulphate - Crystalline Powder, Potash Alum Crystalline Powder and Potassium Aluminium Sulphate Crystals offered by HKD Chemicals and Technologies, Mumbai, Maharashtra. Melting Temperature of Metals Table Chart. Al 2 (SO 4) 3. Watch the solid in the capillary tube and record the temperature when the alum first begins to melt and the temperature when the last crystal of alum melts. Description of how to use the melting point apparatus. Point Group: 2/m 3. It is double salt that is extensively used in medicine and water treatment. - Appearance: Blanco y Cristalino Aluminum Potassium Sulfate Dodecahydrate qualified commercial & research quantity preferred supplier. Aug 9, 2023 · Synthesis of Alum There are several notable types of alum, with potassium, sodium, and ammonium being among the most significant. Synthesize means combining elements to make a chemical substance. It is double salt that is used commonly in medicine and the water treatment process. It is known for its use as the potassium sulfate dodecahydrate and is a double salt commonly used in the medical field and the water treatment process. 1 Trail 3 Show transcribed image text Here’s the best way to solve it. 2 Molecular Structure: Appearance: Crystal Typical Properties Melting Point 92 °C (lit. Using an appropriate chemistry reference book, look up and record the melting point (in °C) of potassium alum. The analysis of the synthesized alum confirmed the presence of potassium, aluminum, sulphate, water of crystallization and a melting point of 92oC. The melting point of potassium alum is 92. In dry air apoplexy lost water of crystallization, in humid air dissolved in water, heated to 92 · 5 ℃ lost 9 crystal water, 200% lost all crystal water into white powder. It has an octahedral structure in a neutral solution and changes into a cubic structure in an alkali solution. 452 Hardness (Mosh-scratch): 2 Crystal structure: Isometric-normal: (111) octahedron Color (solid): Colorless Cleavage: Cubic: (001) Question: 5. (Note: Some reference books call alum "aluminum potassium sulfate dodecahydrate" insteod of "potassium aluminum sulfate dodecahydrate") Note: This will also be part of your data! (See the data table. AP Chemistry lab manual for analyzing alum (AlK (SO4)2·12H2O). 2 - 95. AlK (SO4)2 · 12H2O. Potassium aluminum sulfate dodecahydrate (alum) will be synthesized from aluminum, potassium hydroxide, and sulfuric acid. Uses, properties & Safety Data Sheet. ) Also indicate the melting point range of your alum. 45), Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/off H - Help Screen I - Data Info A Potassium alum is a type of naturally occurring mineral salt that has been used for various purposes throughout history, including as a food preservative, astringent, and antiseptic. Explore a comprehensive list of melting point values for different oxides in both degrees Celsius and degrees Fahrenheit. Odour Odour Threshold pH Melting point/freezing point Initial boiling point and boiling range Flash point Evaporation rate In addition to these chemical processes, potassium aluminum sulfate is also found occurring naturally in minerals such as alunite and kalinite. 74 g (63%). 96 g Both ingredients have melting points higher than aluminum, and melting them together results in a compound with a lower melting point. Incompatibilities Potassium alum is incompatible with strong oxidizing agents, aluminum, copper, steel, and zinc. For a sortable list, see List of chemical elements. A substance's melting point depends on pressure and is usually specified at standard pressure in reference materials. 00 Add to cart Request a Quote Click or Call 800-795-8788 Nov 26, 2021 · Potassium - Melting Point - Boiling Point . 9 94. Average melting point (oC) The melting point of potassium alum is 92. We would like to show you a description here but the site won’t allow us. The chemical formula of potash alum is K 2 SO 4. 5 °C. The boiling point of the substance is approximately 200°C. Browse Aluminum potassium sulfate dodecahydrate and related products at MilliporeSigma. Learn about its properties, different types, production process, and various uses. 10 Den (Calc)= 1. Pure Aluminum always reacts with oxygen rapidly. Assuming an equal mole ratio of the reactant to the product, calculate the percent yield (in grams) if 9. ) Appearance Crystal Colour White Aluminium potassium sulfate dodecahydrate CAS 7784-24-9 EMPROVE® ESSENTIAL Ph Eur,BP,USP - Find MSDS or SDS, a COA, data sheets and more information. 0-95. Data for the elements were selected from the primary literature; the assistance of Gernot Lang in compiling these data is gratefully Explore a comprehensive list of melting point values for pure metals in both degrees Celsius and degrees Fahrenheit. Hazardous Decomposition Products: Decomposition of dried potassium aluminum sulfate occurs at high temperatures can produce sulfur oxides and other noxious fumes. Chemistry experiment. Nov 2, 2023 · When comparing the melting points, we see that the ionic compounds (potassium chloride, sodium chloride, and aluminum oxide) have much higher melting points than sucrose, which is a molecular compound. The molar mass of the potash alum is 258. 388. Aluminum potassium sulfate, also known as potash alum or potassium alum, typically appears as a white crystalline solid. 88 g/l : Melting point/range: 92 °C (198 °F) - lit. 5 o C. First-aid measures after inhalation : If breathed in, move person into fresh air. Potassium Alum | AlKO8S2 | CID 24856 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. Or you can calibrate your thermometer using water. 3 at 94. : No data available : Not applicable : No data available : No data available Upper/lower flammability or explosive Alum, which is used by many of us, has various interesting facts associated with it. Jun 5, 2018 · The present disclosure provides a potassium aluminum fluoride (KAlF4) flux agent having improved properties such as a lower melting point which allows for the use of solders and alloys with lower melting points. It often forms transparent crystals that can be large and well-defined. Synonyms: Potassium aluminium sulfate, Alum potassium, Potassium alum CAS Number: 7784-24-9 EC Number: 232-261-3 Molar Mass: 474. 3. Potassium aluminum sulfate forms a solid, white powder at room temperature. What is the where tm is the melting point and k is given in the fifth column of the table. From the mass of anhydrous alum remaining in the crucible after heating and its formula, AIK (SO. 5. Its chemical formula is KCr (SO 4) 2 and it is commonly found in its dodecahydrate form as KCr (SO 4) 2 ·12 (H 2 O). Key features of Honeywell Potassium fluoroaluminate include a low melting point and controlled particle size distribution. Potassium Aluminium Fluoride is a complex fluoride salt that is formed by combining potassium fluoride (KF) and aluminum fluoride (AlF3) in a 3:1 ratio. Twinning: Very rare on {111}. Aluminum potassium sulfate, or potash alum, is also used as a filler in Paper, Cement, and paints. Nov 3, 2025 · ALUMINUM POTASSIUM SULFATE (CAS 10043-67-1) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight compound to a known good sample of potassium alum. Comment on the purity of your sample based on your experimental melting point. CAS 7784-24-9. Often referred to as potassium alum or potassium aluminium sulfate, Potash alum is a widely used chemical compound. AI generated definition based on: Photovoltaic Water Pumping Systems, 2021 We place a small quantity of alum in a capillary tube, and then heat it in a Vernier Melt Station. The anhydrous potassium alum has different physical and chemical properties compared to its hydrated counterpart. Dispose of the capillary tube in the broken glass container. Occurs naturally as efflorescence on alum shale and as feather alum on lava; Used to dress fur skins (one of oldest methods); Forms aluminum potassium sulfate (CAS 10043-67-1) when heated above melting point (92. Aluminum potassium sulfate (hydrated) has the Aug 1, 2019 · Abstract Single crystal of potassium aluminum sulfate dodecahydrate (potash alum) was grown by the slow evaporation technique of supersaturated aqueous solution at room temperature. Ph Eur - Find MSDS or SDS, a COA, data sheets and more information. 39 g/mol). You see name and chemical formula next to temperature converted to the unit of your choice (Celsius deegres, kelvins, Fehrenheits degrees etc. It has a melting point of 550°C and a boiling point of 1500°C. 5 - 94. Potassium alum, under the name "alum powder", is found in the spice section of many grocery stores in the US. 12 H₂O Download: Datasheet | CoA | SDS Categories: A, Laboratory en, salts, synthesis and chemical reactions General information Specification Ordering code Hazard symbol The molar mass and molecular weight of KAl(SO4)2*12H2O (Aluminum Potassium Sulfate Dodecahydrate) is 474. Document Potassium Alum Synthesis & Melting Point Analysis Report, Subject Chemistry, from National Tsing Hua University, Taiwan, Length: 7 pages, Preview: X B TR 3 EXY. Aluminum potassium sulfate dodecahydrate, 98+%, ACS reagent from Thermo Scientific Chemicals. Chemistry, high school/early college level. Give two reasons that could cause the melting point to be like this. The literature value for the melting point of alum is 92. Potash alum is also known as a 'double sulfate' because it contains two cations - potassium and aluminium. Provide samples of alum and ask students to design procedures for measuring the melting point and percent water in the compound. The product is generated through the precipitation process from a solution in water. 5 °c. Melting Point: Potassium alum melts at around 92-95°C (197-203°F). Ideal for chemistry students. 39. Jul 23, 2025 · Potash Alum also known as Potassium Aluminum Sulfate is a chemical compound commonly used as potassium sulfate dodecahydrate. Ignited potassium burning lilac. Sodium alum is very soluble in water, and is extremely difficult to purify. We record the temperature range at which the crystals melt at. 62 g is used to prepare KAl (SO4)2•12 H2O (molar mass 474. 55), 4. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium oxide. Potash alum is also known as potassium alum or potassium aluminium sulfate. Learn about Potash alum in detail, which is a white crystalline double sulfate of potassium and aluminum, commonly used in water purification and dyeing. Sep 19, 2024 · Potassium alum, potash alum, or potassium aluminum sulfate is a chemical compound: the potassium double sulfate of aluminium. The oxide, alumina, occurs naturally as ruby (Al 2 O 3), sapphire, corundum, and emery, and is used in glassmaking and refractories. The most common type is potassium aluminum sulfate, often referred to simply as "alum. zkiul fatlgyo pzv nzxglv cukhs lmpd lhhmm cobgyzi jzxmnar kkynoo kfa zzq dszfmzbmq qynmts ugyt