# ### analysis of alum kal so4 2 12h2o Alum crystals are of great purity and are easily prepared Because of their purity, they are often used in dyeing cloth, where the alum acts as a source of Al+3 ions which are not contaminated These properties can be determined experimentally and in this experiment as mentioned above, a few properties of alum were being determined Based on the limiting reactant, you can then find the theoretical moles of KAl(SO4)2*12H2O From moles, you can find grams by using the molar mass of the alum Finally, for % yield, it will be actual yield (1277g) divided by the theoretical yield (x100%) I had a 1094g of mystery Alum "AB(SO4)c dH2O" (I assume that that the Alum is KAl(SO4)2-12H2O but we don't know A B c or d, we do know that mass percent of water is 519) After processing the alum (Ba(NO3)2 and HNO3 through a asked by Graham on February 1, 2013; Crystallization experiment Potash alum [KAl(SO4)212H2O] catalysed esteriﬁcation , (Direct Analysis Real Time) source Elemental analyses were performed on a Perkin Elmer 2400 Series II Elemental CHNS analyzer 21 Puriﬁcation of potash alum Potash alum was powdered well in mortar and washed #15 Crystallization of Alum #16 Alum crystals #17 Suction Filter Alum #18 Suction Filter Alum #19 Dry on a pre-weighed paper #20 Weigh crystals, Calculate %Yield #21 Summary of Equations #22 Qualitative Analysis of Alum KAl(SO4)212H2O #23 Prepare saturated Alum solution By stoichiometric analysis, 1:1 mole ratio is given for aluminum reacted to alum salt produced, thus by equation five, 3638 x 10-2 mole of alum salt may be produced at maximum Before calculating percent yield, the mass of anhydrous alum salt still in solution can be calculated by Equation 8, accurate only if the solution is primarily one of . Aluminum potassium sulfate | AlK(SO4)2 or KAl(SO4)2 or AlKO8S2 | CID 24856 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more So I'm doing a lab report for AP chemistry and I need help to determine a title , Convert this title to a college level title , This is the title : analysis of alum, KAl(SO4)2 12H2O . Abstract Two earlier published experimental data [C H Shomate, J Am Chem Soc 67, 765 (1945); D G Kapadnis and R Hartmans, Physica 22, 173 (1956)] of the molar heat capacity C p of potassium alum, KAl(SO 4) 2 12H 2 O, are revisited From analysis of the temperature dependence of C p [D G Kapadnis and R Hartmans, Physica 22, 173 (1956)] below 20 K by using the experimental values . CALCULATIONS & ANALYSIS 1 Determine the theoretical yield of the alum crystals synthesized in the previous lab Use the aluminum foil as the limiting reagent and presume that the foil was pure aluminum Theoretical: 12873g Al *(1mol Al/2698g Al) = 004771 mol Al 004771mol Al * (1mol KAl(SO4)2*12H2O/1mol Al) = 004771 mol Alum 004771 mol Alum * (4743884g Alum/ 1 mol Alum) = 2263g Alum 2 We put our alum crystals in the crucible and gently heated it We then measured and recording the mass after it had been heated, and after it had dried overnight Calculations: Determining the percent sulfate 7 The crystals were small and white They stuck together to form a One obvious solution to the problem is to recycle the used fabricated aluminum into other useful products or into aluminum compounds This research illustrate a chemical process in which waste aluminum is converted chemically into an aluminum compound ie hydrated potassium aluminum sulfate, KAl(SO4)2 •12H2O, or commonly known as Alum k+ (aq) + al3+ (aq) + 2 so4 2- (aq) + 12 h2o (l) ? kal(so4)2 * 12 h2o (s) my question is i dont know which equation to use to calculate the percent yield should it be the first one since it is before any of the procedure was done? but from the first equation, it did not produce the alum crystals yet : kal(so4)2 * 12h20 equation for percent . A substance of known concentration, an acid for example, is added to a substance of unknown concentration, a base for example, until an indicator undergoes a color change showing that the acid and base are present in a known proportion KAl(SO4)2 x 12H2O and BaCl2 reacted KAl(SO4)2 + 2BaCl2 yields 2BaSO4 +KAlCl4 BaSO4 is not soluble; thus it is a good test of SO4-2 ions since it was the only ion in the reaction that would form a precipitate with barium Alum Lab Part 1: Synthesis of Alum, KAl(SO4)2•12H2O In this experiment the ionic compound, potassium aluminum sulfate (KAl(SO 4)2•12H2O), will be prepared from a water solution that contains K+, Al3+ and SO2-(potassium, aluminum, and sulfate ions, respectively) The aluminum ions will be formed by oxidizing aluminum from aluminum foil Name: _____ Section: _____ Experiment 4: Synthesis of Alum Pre-laboratory Assignment , ( KAl(SO4)2 • 12 H2O) from aluminum foil and other basic chemicals This alum is widely used to dye fabrics, make pickles crunchy, and manufacture , 2 • 12 H2O from aluminum foil, (2) determine the limiting reagent in the synthesis, and (3) calculate . A student research and analysis report on the the synthesis of Alum The purpose of this experiment is to determine the formula for the hydrate alum , The following sequential reactions take place in this experiment to synthesize alum (KAl(SO 4) 2 * 12H 2 O): This synthesis demonstrates the aluminum hydroxide’s ability to act . Experiment 4: Synthesis of Alum from Scrap Aluminum Objective: In this experiment, you will be converting the aluminum metal from a beverage can into the chemical compound potassium aluminum sulfate, KAl(SO 4) 2•12 H 2 O, commonly referred to as alum Introduction It had been a good year for the O’Keefe farm with just the right amount of sun The Synthesis of Alum from Scrap Aluminum Overview of the Synthesis The synthesis of alum, KAl(SO 4) 2⋅12H 2O, can be accomplished through the following reactions Aluminum is first oxidized by potassium hydroxide to form a soluble salt in the chemical Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound: the double sulfate of potassium and aluminium, with chemical formula KAl(SO 4) 2It is commonly encountered as the dodecahydrate, KAl(SO 4) 2 12H 2 O It crystallizes in cubic structure with space group P a -3 and lattice parameter of 1218 ÅThe compound is the most important member of the generic class of . Aluminum Potassium Sulfate Dodecahydrate AlK(SO4)2 • 12H2O bulk & research qty manufacturer Properties, SDS, Applications, Price Free samples program Term contracts & , In this experiment you will prepare an alum–KAl(SO4)212H2O [potassium aluminum sulfate dodecahydrate]–from scrap aluminum This compound is widely used in dyeing fabrics, making pickles, making paper and purifying water Although aluminum metal sits well above hydrogen in the activity series, it reacts only slowly Abstract: Potassium alum (KAl(SO4)212H2O), commonly known as ‘alum’, has recently drawn the attention of synthetic chemists as an efficient, safe and eco-friendly acid catalyst in implementing a large number of organic transformations, thereby generating interesting molecular frameworks Tschermigite, (NH4)Al(SO4)212H2O, is a rather rare mineral of the alum group that occurs in such environments as burning coal seams, guano deposits and volcanic-related conditions in association . → 2 KAl(SO4) 2•12 H 2 O (s) , Synthesis and Analysis of Potassium Aluminium Sulphate (Alum) from Waste Aluminium Can , The quantitative analysis of the Alum crystal indicated that it contained Aluminum and Potassium with concentration (ppm) 1898059 ± 00008 and 2150 ± The purpose of this experiment is to use aluminum from an aluminum can to synthesize a chemical compound, alum, which is hydrated potassium aluminum sulfate, KAl(SO4)2•12 H2O Aluminum beverage cans generally have a thin coating of plastic on the inside that protects the aluminum from the corrosive action of the chemicals in the beverage Oct 07, 2012· Objective: In this experiment, you will be converting the aluminum metal from a beverage can into the chemical compound potassium aluminum sulfate, KAl(SO4)2•12 H2O, commonly referred to as alum Introduction It had been a good year for the O’Keefe farm , KAl(SO4)2 crystal was obtained by heating KAl(SO4)212H2O powder at 500 C for 2 h The XRD pattern of the potash alum crystals heated at 180 C for 2 h suggests a phase transition to an amorphous phase; the heat-induced amorphization of alum has been previously revealed by XRD analysis  The XRD patterns of the samples recovered from shot 2 . Potassium Alum - Potassium alum also known as potash alum, or potassium aluminum sulfate is a chemical compound with formula KAl(SO4)212H2O Alum is the common name for this chemical compound, given the nomenclature of potassium aluminum sulfate dodecahydrate It is commonly used in water purification, leather tanning, dyeing, fireproof textiles, and baking powder