A 4.000-g sample containing KCl and KClO₄ was dissolved in sufficient water to give 250.00 mL of solution. A 50.00-mL portion of the solution required 41.00 mL of 0.0750 M AgNO₃ in a Mohr titration. Next, a 25.00-mL portion of the original solution was treated with V₂(SO₄)₃ to reduce the perchlorate ion to chloride,

and the resulting solution was titrated with AgNO₃. This titration required 38.12 mL of 0.0750 M AgNO₃. What is the mass percent of KCl and KClO₄ in the mixture?

Transcribed Image Text:

8 V³+ (aq) + ClO4 (aq) + 12 H₂O(l) → Cl(aq) + 8 VO2+ (aq) + 8 H3O+ (aq)