Practice question
Question
A 0.2 M NaCl solution is diluted by adding 250 mL of water to 150 mL of the original solution. What is the final molarity?
Explanation
M₁V₁ = M₂V₂. 0.2 × 150 = M₂ × (150 + 250). M₂ = (0.2 × 150)/400 = 0.075 M.
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