Practice question
Question
What is the molarity of a solution prepared by dissolving 4 g of NaOH (molar mass = 40 g/mol) in 250 mL of solution?
Explanation
Moles of NaOH = (4/40) = 0.1 mol . Volume = 250 mL = 0.25 L. Molarity = (0.1/0.25) = 0.4 M .
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