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30. What weight of impure ferrous ammonium sulfate sample in milligrams must be taken for analysis so that the number of centigrams of BaSO will represent five times the % S in the sample? a. 230 mg b. 345 mg c. 460 mg d. 690 mg 31. If 100 mL of a dichromate solution (10 grams K2Cr2O7 per liter), 5 mL of 6 N H₂SO and 75 mL of a ferrous solution (80 grams of FeSO4-7 H₂O per liter) are mixed, and resulting solution titrated with 0.2121 N KMnO4, what volume of is required KMnO4? a. 5.60 mL b. 5.80 mL c. 6.00 mL d. 6.20 mL

30. What weight of impure ferrous ammonium sulfate sample in milligrams must be taken for analysis so that the number of centigrams of BaSO will represent five times the % S in the sample? a. 230 mg b. 345 mg c. 460 mg d. 690 mg 31. If 100 mL of a dichromate solution (10 grams K2Cr2O7 per liter), 5 mL of 6 N H₂SO and 75 mL of a ferrous solution (80 grams of FeSO4-7 H₂O per liter) are mixed, and resulting solution titrated with 0.2121 N KMnO4, what volume of is required KMnO4? a. 5.60 mL b. 5.80 mL c. 6.00 mL d. 6.20 mL

Introductory Chemistry For Today
Introductory Chemistry For Today
8th Edition
ISBN:9781285644561
Author:Seager
Publisher:Seager
Chapter7: Solutions And Colloids
Section: Chapter Questions
Problem 7.32E
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30. What weight of impure ferrous ammonium sulfate sample in milligrams must be taken for analysis so that the number of centigrams of BaSO will represent five times the % S in the sample? a. 230 mg b. 345 mg c. 460 mg d. 690 mg 31. If 100 mL of a dichromate solution (10 grams K2Cr2O7 per liter), 5 mL of 6 N H₂SO and 75 mL of a ferrous solution (80 grams of FeSO4-7 H₂O per liter) are mixed, and resulting solution titrated with 0.2121 N KMnO4, what volume of is required KMnO4? a. 5.60 mL b. 5.80 mL c. 6.00 mL d. 6.20 mL
Transcribed Image Text:30. What weight of impure ferrous ammonium sulfate sample in milligrams must be taken for analysis so that the number of centigrams of BaSO will represent five times the % S in the sample? a. 230 mg b. 345 mg c. 460 mg d. 690 mg 31. If 100 mL of a dichromate solution (10 grams K2Cr2O7 per liter), 5 mL of 6 N H₂SO and 75 mL of a ferrous solution (80 grams of FeSO4-7 H₂O per liter) are mixed, and resulting solution titrated with 0.2121 N KMnO4, what volume of is required KMnO4? a. 5.60 mL b. 5.80 mL c. 6.00 mL d. 6.20 mL
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