A sample of a new cleaning product, "Joe's Famous Bleach Cleaner," with a mass of 61.0 g, was diluted with an acetic acid solution containing excess I. A small amount of starch indicator solution was then added, turning the solution a deep bluish-purple. The solution was then titrated with 0.430 M sodium thiosulfate, Na2S2O3, containing the ion S₂O3².A volume of 41.0 mL of sodium thiosulfate, the titrant, was needed to turn the solution colorless. 2- Percent composition To obtain percent composition by mass, use the equation given here: ▾ Part A percent composition = mass due to specific component total mass of the mixture x 100% What is the percentage composition by mass of NaClO in the bleach product? Express your answer to three significant figures and include the appropriate units.

A sample of a new cleaning product, "Joe's Famous Bleach Cleaner," with a mass of 61.0 g, was diluted with an acetic acid solution containing excess I. A small amount of starch indicator solution was then added, turning the solution a deep bluish-purple. The solution was then titrated with 0.430 M sodium thiosulfate, Na2S2O3, containing the ion S₂O3².A volume of 41.0 mL of sodium thiosulfate, the titrant, was needed to turn the solution colorless. 2- Percent composition To obtain percent composition by mass, use the equation given here: ▾ Part A percent composition = mass due to specific component total mass of the mixture x 100% What is the percentage composition by mass of NaClO in the bleach product? Express your answer to three significant figures and include the appropriate units.

General Chemistry - Standalone book (MindTap Course List)

11th Edition

ISBN:9781305580343

Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Chapter24: Polymer Materials: Synthetic And Biological

Section: Chapter Questions

Problem 24.79QP

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2-chlorobenzoic acid (C 6 H 4 ClCOOH) is produced by diazotization. 6.25 g of anthranilic acid (0-aminobenzoic acid, C 6 H 4 NH 2 COOH) is allowed to react with 3.5 g of sodium nitrite in hydrochloric acid solution, whereby diazonium (C 6 H 4 N 2 ClCOOH) is formed. 4.5 grams of Cu(I) chloride are dissolved in conc. hydrochloric acid and 5 mL of water, after which the diazonium solution is added, whereby 2-chlorobenzoic acid is formed. The acid is separated and purified by recrystallization. 3.02 grams of product is obtained. Calculate the yield.
Batrachotoxin (C31H42N2O6) is the most potent non-peptide (we'll learn what that means in Lesson 7) based poison known. It gained fame though its use in poison darts made from frog excretions. The frogs themselves don't produce the toxin directly, but through digestion of Melyrid beetles the frogs eat. Suppose you are trekking through the rainforest and discover an even more potent toxin that has the same empirical formula as batrachotoxin. If the molar mass of this new poison is 3,232.02 g/mol, what is its molecular formula?
Five white, 500-mg uncoated ascorbic acid (AA) tablets with an average weight of 0.6100-g were pulverized in a mortar. A sample of the powdered ascorbic acid weighing 0.4610-g was placed in an iodine flask and was dissolved in 50-mL H2SO4 then 5-g of KBr was added to the resulting solution. The solution was titrated with 46.73-mL of 0.0152 M STD. KBrO3 to reach a faint yellow endpoint then 3-g KI and 5-mL Starch TS. The blue color solution is then titrated with 2.78-mL of 0.1047 M STD. Na2S2O3 to reach the disappearance of the blue iodostarch complex. MW: KBrO3 = 167.0 ; KIO3 = 214.0 ; Na2S2O3 = 158.11 ; C6H8O6 = 176.12 Compute the milligrams of pure AA per tablet from the assay. None of the choices 349.7 mg 264.3 mg 462.7 mg
Five white, 500-mg uncoated ascorbic acid (AA) tablets with an average weight of 0.6152-g were pulverized in a mortar. A sample of the powdered ascorbic acid weighing 0.4700-g was placed in an iodine flask and was dissolved in 50-mL H2SO4 then 5-g of KBr was added to the resulting solution. The solution was titrated with 47.81-mL of 0.09640 N STD. KBrO3 to reach a faint yellow endpoint then 3-g KI and 5-mL Starch TS. The blue color solution is then titrated with 2.73-mL of 0.09123 N STD. Na2S2O3 to reach the disappearance of the blue iodostarch complex. MW: KBrO3 = 167.0 ; KIO3 = 214.0 ; Na2S2O3 = 158.11 ; C6H8O6 = 176.12 Compute the milligrams of pure AA per tablet from the assay. 293.3 mg 502.5 mg None of the choices 383.9 mg
The ethyl acetate concentration in an alcoholic solution was determined by diluting a 10.00-mL sample to 100.00 mL. A 19.00-mL portion of the diluted solution was refluxed with 40.00 mL of 0.04601 M KOH: CH3 СОО С2H; + ОН — СH3 COO + C2H; ОН After cooling, the excess OH was back-titrated with 3.02 mL of 0.05056 M H2 SO4. Calculate the amount of ethyl acetate (88.11 g/mol) in the original sample in grams. Amount of ethyl acetate =
A quantitative analysis for ethanol, C2H60, is accomplished by a redox back titration. Ethanol is oxidized to acetic acid, C2H402, using excess dichromate, 2- Cr207, which is reduced to Cr3*. The excess dichromate is titrated with Fe2+, of a brandy is diluted to 500 mL in a volumetric flask. A 10.00-mL sample is taken and the ethanol is removed by distillation and collected in 50.00 mL of an giving Cr3+ as products. Ina typical analysis, a 5.00-mL sample and Fe3+ acidified solution of 0.0200 M K2Cr207. Titration of the unreacted Cr207 requires 21.48 mL of 0.1014 M Fe2*. Calculate the %w/v ethanol in the brandy. 2- Which is the analyte in this problem? C2H60 O Cr207 2- C2H402 Fe2+
The conversion of highly oxygenated biomass carbohydrates into useful hydroxyl- free fine chemicals can now be achieved through hydrogenation in the presence of the following metal catalyst: Pb Ru Li Cr
True or false? A) Calcium acetate and sodium carbonate is Ca2+(aq) + 2C2H3O2-(aq) ----> Ca(C2H3O2)2(s) B) Magnesium chloride and sodium hydroxide is Mg2+(aq) + 2OH-(aq) ----> Mg(OH)2(s) C) Sodium phosphate and potassium nitrate, no reaction occurs. D) Ammonium sulfate and barium nitrate is Ba2+(aq) + SO42-(aq) ----> BaSO4(s)
A 1.250 g sample of bauxite (the primary ore of aluminum) was analyzed for aluminum. The sample was powderized and treated in concentrated nitric acid. The nitric acid was removed and solids were treated in hot water with added nitric acid. Insoluble solids were removed by gravity filtration. The solution was made basic by the slow addition of dilute ammonia forming the gelatinous precipitate (Al(OH), and Al,O,.x H2O). The precipitate was heated to coagulate it then filtered over filter paper. The paper and solids were placed in a porcelain crucible and the paper was ashed while the precipitate was ignited at 600°C to convert the precipitate to pure Al,O,. The mass of Al,O, recovered was 0.2890 g. The average mass of ash after charring 10 sheets of the identical filter paper was 0.0007 g. Calculate the percent aluminum in the bauxite ore sample.
What are the products in the following chemical equation: Zn+CuSO4 --> ZnSO4 + Cu
The amount of ascorbic acid, C6H8O6, in orange juice was determined by oxidizing the ascorbic acid to dehydroascorbic acid, C6H6O6, with a known excess of I2, and back titrating the excess I2 with Na2S₂O3 A 5.00-mL sample of filtered orange juice was treated with 50.00 mL of excess 0.02046 N I2. After the oxidation was complete, 13.82 mL of 0.07203 N Na2S₂O3 was needed to reach the starch indicator endpoint. Calculate the concentration of ascorbic acid in milligrams per 100 mL.
Ksp of silver phosphate Ag3PO4 = 1.3 x 10-20

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General Chemistry - Standalone book (MindTap Cour…

Chemistry

ISBN:

9781305580343

Author:

Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Publisher:

Cengage Learning