Practice question
Question
A 0.4 M HCl solution is diluted by adding 200 mL of water to 100 mL of the original solution. What is the final molarity?
Explanation
M₁V₁ = M₂V₂. 0.4 × 100 = M₂ × (100 + 200). M₂ = (0.4 × 100)/300 ≈ 0.133 M.
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