A 1.59 g sample containing KI was analyzed gravimetrically and 0.0538g of Barium Iodate was recovered... express the results of this analysis as percent posassium iodide.
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A 1.59 g sample containing KI was analyzed gravimetrically and 0.0538g of Barium Iodate was recovered... express the results of this analysis as percent posassium iodide.
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- 1 Point In gravimetric determination of sulfate present in the soil, 0.2075g of sample was treated with 0.2 M barium chioride. which forms precipitate. The precipitate was then heated in the oven by keeping it in crucible. If the initial crucible weight was 3.0531g and final was 3.5016 g. What is the mass % of sulfate in the unknown sample? 89.50% 19.00% 92.01% D 90.46%A 1.787 g sample containing some Fe2+ ion requires 31.50 ml of a 0.02188 M KMnO4solution to reach a pink endpoint. What is the percent by mass of Fe2+ in the sample?The aluminum in a 1.200-g sample of impure ammonium aluminum sulfate was precipitated with aqueous ammonia as the hydrous Al2O3.xH2O. The precipitate was filtered and ignited at to give anhydrous Al2O3, which weighed 0.2001 g. Express the result of this analysis in terms of %NH4Al(So4)2 %Al2O3 %Al
- An unknown sample containing a mixture of NaCl and Na2CO3 was analyzed to determine the % composition of each compound. In the analysis for Na2CO3 (soda ash), the following data were obtained mass of unknown - 0.4436 g conc. of HCl used - 0.25 N initial volume - 0.5 mL final volume - 20.0 mL (MW soda ash) 106.12) 1.) What method was used to determine the concentration of HCl? 2.) What is the net volume of HCl used in the titration? 3.) What is % Na2CO3 in the given sample? NOTE: Round off your answer to a whole number (2 sig fig)A newly-discovered iron ore was examined to determine percent iron in the ore gravimetrically. 5.408 grams of the ore samples was subjected to gravimetric analysis and precipitated as iron (III) oxide and dried at 105 degrees Celsius. What is the percent iron contentn of the ore if the mass of the precipitate is 0.3785 grams?100.0 cm3 of a 1.234 mol.dm-3 solution of nickel(II) nitrate was added to 150.0 cm3 of a 1.178 mol.dm-3 solution of sodium carbonate. Determine the limiting reagent
- (data) I mixed 1.00 mL of 0.100 M copper(II) sulfate with 1.00 mL of 3.00 M sodium hydroxide. What mass (in grams) of precipitate forms, if the percent yield is 45.9%?Gravimetric analysis of Fe3O4 (MW = 232 g/mole) may be undertaken with the following reactions: Fe3O4 → Fe2O3 → Fe (OH)3. Weight of sample containing 8.00% Fe3O4 that must be taken to obtain a precipitate of Fe(OH)3 (MW = 107 g/mole) that weighs 150 mg is . a. 0.108 g b. 0.325 g c. 1.355 g d. 4.065 g Amount of Fe2O3 (MW = 160 g/mole) from which 150 mg of Fe(OH)3 (MW = 107 g/mole) may be obtained is . a. 0.112 g b. 0.224 g c. 0.448 g d. none of the other choiceswhat is the correct volume of 2.5M PhMgBr in THF is needed to completely react with 1.5ml of methyl benzoate?you do not need to consider and excess and should calculate (and choose) the minimum amount as required by the reaction stoichiometry Enter your answer to one decimal place with the proper unit of measurement.
- 11. 50.0 g of silver nitrite is mixed with 50.0 g of hydrochloric acid in a water based solution. A white precipitate forms. The solution is filtered and the white precipitate collected and dried. The dried precipitate is measured to have a mass of 36.1 g. What is the percent yield?What is the percent magnesium hydroxide, if a sample of magnesia magma weighing 5.2430g when dissolved in 25 mL of 0.9915 N H2SO4 required 9.85 mL of 1.4102 N NaOH to titrate the excess acid? Round to 2 decimal point; Answer should be with the correct unit.A student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample underwentprecipitation using BaCl2 and was digested for overnight. The precipitate was then filtered off to obtain white crystalline precipitate that was collected inan ash less filter paper. In performing constant weighing, he obtained a crucible mass that is 29.9442 g. After burning his samples inside the crucible,the obtained mass was 30.3375 g. Compute for the theoretical % SO3 obtained by the student and the theoretical mass (g) of SO3 that should be obtained by the student using his weighed sample