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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 BaSO4 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 H₂SO₁ 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 BaSO4 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 H₂SO₁ 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

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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 BaSO4 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 H₂SO₁ 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 BaSO4 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 H₂SO₁ 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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