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IB Chemistry Test Prep

Category - IB Chemistry

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What volume of .250 M potassium hydroxide is needed to neutralize 1.25 liters of .500 M hydrochloric acid?

2.50 liters
1.25 liters
.625 liters
.375 liters
5.0 liters

Explanation

Answer: 2.50 Liters

Hydrochloric acid (HCl) is a strong, monoprotic acid. Potassium hydroxide (KOH) is a strong base that contains one hydroxide anion per molecule. The concentrations and volumes of these solutions are related by the formula (Molarity₁)(Volume₁) = (Molarity₂)(Volume₂). Entering the variables into this equation gives (.250 M)(Volume₁) = (.500 M)(1.25 liters). Solve for Volume₁ to find the correct answer, 2.5 liters.

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