A treatment of a 0.2500-g sample of impure potassium chloride (KCI) with an excess of AGNO3 (169.87 g/mol) resulted in the formation of 0.2912-g of AgCI (143.32 g/mol). Calculate the percentage of KCI (74.55 g/mol) in the sample. Now remember, in order to get the % KCI, you need to use this formula: mass of KCl (Converting the mass of AgCl to mass of KCI) %KCI = × 100 mass of the sample

A treatment of a 0.2500-g sample of impure potassium chloride (KCI) with an excess of AGNO3 (169.87 g/mol) resulted in the formation of 0.2912-g of AgCI (143.32 g/mol). Calculate the percentage of KCI (74.55 g/mol) in the sample. Now remember, in order to get the % KCI, you need to use this formula: mass of KCl (Converting the mass of AgCl to mass of KCI) %KCI = × 100 mass of the sample

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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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

100%

A treatment of a 0.2500-g sample of impure potassium chloride (KCI) with an excess
of AGNO3 (169.87 g/mol) resulted in the formation of 0.2912-g of A9CI (143.32 g/mol).
Calculate the percentage of KCI (74.55 g/mol) in the sample. Now remember, in order
to get the % KCI, you need to use this formula:
mass of KCl (Converting the mass of AgCl to mass of KCI)
%KCI =
x 100
mass of the sample
96.50 %
50.96 %
59.60 %
60.59 %

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