Practice question
Question
What is the mass percentage of KCl in a solution made by dissolving 7.45 g of KCl in 42.55 g of water? (Molar mass: KCl = 74.5 g/mol)
Explanation
Total mass = 7.45 + 42.55 = 50 g. Mass % = (7.45/50) × 100 = 14.9%.
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