A solid mixture of calcium chloride and sodium chloride has mass 1.695 g. It is dissolved in water, and excess silver nitrate precipitates all the chloride as AgCl, of mass 4.305 g. What is the percentage of sodium chloride in the mixture by mass? Atomic masses in g mol⁻¹: Na 23.0, Cl 35.5, Ca 40.0, Ag 108.0.

ChemistryAdvancedHigh School (11–12)Atoms and Molecules › The Mole Concept Olympiad

A solid mixture of calcium chloride and sodium chloride has mass $1.695\ \text{g}$ . It is dissolved in water, and excess silver nitrate precipitates all the chloride as $\text{AgCl}$ , of mass $4.305\ \text{g}$ . What is the percentage of sodium chloride in the mixture by mass? Atomic masses in $\text{g mol}^{-1}$ : Na 23.0, Cl 35.5, Ca 40.0, Ag 108.0.

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