1. Analyst A bought a powder that contains sulfate ions, reported as 25.00% sulfur trioxide (MW 80.07 g/mol). In a 5.00-g sample dissolved in 100 mL water, how much BaSO4 (MW 233.39 g/mol) will precipitate if 50.0 mL of 0.200 M BaCl2 was used? a. 0.429 g b. 2.33 g c. 0.800 g d. 3.64 g 2. If the dried crucible weighs 1.4834 g and the dried crucible + BaSO4 (MW 233.39 g/mol) precipitate weighs 1.6858 g, what is the percent sulfite (MW 80.07 g/mol) if the starting sample weighs 500.0 mg? a. 13.89% b. 20.5% c. 29.1% d. 59.7% 3. What is the minimum mass of BaCl2 (MW = 208.23 g/mol) required to be dissolved in 100.0 mL of H2O if all of this will be mixed with 200.0 mL of 0.100 M Na2SO4 (MW = 142.04 g/mol) to ensure complete precipitation? a. 3.83 g b. 2.84 g c. 4.16 g d. 2.08 g
1. Analyst A bought a powder that contains sulfate ions, reported as 25.00% sulfur trioxide (MW 80.07 g/mol). In a 5.00-g sample dissolved in 100 mL water, how much BaSO4 (MW 233.39 g/mol) will precipitate if 50.0 mL of 0.200 M BaCl2 was used? a. 0.429 g b. 2.33 g c. 0.800 g d. 3.64 g 2. If the dried crucible weighs 1.4834 g and the dried crucible + BaSO4 (MW 233.39 g/mol) precipitate weighs 1.6858 g, what is the percent sulfite (MW 80.07 g/mol) if the starting sample weighs 500.0 mg? a. 13.89% b. 20.5% c. 29.1% d. 59.7% 3. What is the minimum mass of BaCl2 (MW = 208.23 g/mol) required to be dissolved in 100.0 mL of H2O if all of this will be mixed with 200.0 mL of 0.100 M Na2SO4 (MW = 142.04 g/mol) to ensure complete precipitation? a. 3.83 g b. 2.84 g c. 4.16 g d. 2.08 g
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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1. Analyst A bought a powder that contains sulfate ions, reported as 25.00% sulfur trioxide (MW 80.07 g/mol). In a 5.00-g sample dissolved in 100 mL water, how much BaSO4 (MW 233.39 g/mol) will precipitate if 50.0 mL of 0.200 M BaCl2 was used?
a. 0.429 g
b. 2.33 g
c. 0.800 g
d. 3.64 g
2. If the dried crucible weighs 1.4834 g and the dried crucible + BaSO4 (MW 233.39 g/mol) precipitate weighs 1.6858 g, what is the percent sulfite (MW 80.07 g/mol) if the starting sample weighs 500.0 mg?
a. 13.89%
a. 13.89%
b. 20.5%
c. 29.1%
d. 59.7%
3. What is the minimum mass of BaCl2 (MW = 208.23 g/mol) required to be dissolved in 100.0 mL of H2O if all of this will be mixed with 200.0 mL of 0.100 M Na2SO4 (MW = 142.04 g/mol) to ensure complete precipitation?
3. What is the minimum mass of BaCl2 (MW = 208.23 g/mol) required to be dissolved in 100.0 mL of H2O if all of this will be mixed with 200.0 mL of 0.100 M Na2SO4 (MW = 142.04 g/mol) to ensure complete precipitation?
a. 3.83 g
b. 2.84 g
c. 4.16 g
d. 2.08 g
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