Problem: Calcium hydroxide and hydrobromic acid react together in the following reaction.Ca(OH)2 (aq) + HBr (aq) → CaBr2 (aq) + H2O (l)25.00 mL of 1.50 M HBr are needed to titrate 32.801 mL of Ca(OH)2. What is the molarity of Ca(OH)2?

FREE Expert Solution

We're being asked to calculate the molarity of Ca(OH)2.

We're given the unbalanced reaction:           Ca(OH)2(aq) + HBr(aq) → CaBr2(aq) + H2O(l)

Balancing the reaction:

Ca(OH)2(aq) + 2 HBr(aq) → CaBr2(aq) + 2 H2O(l)


Step 1: Calculate the moles of Ca(OH)2.

molarity HBr (volume) → moles HBr (mole-to-mole comparison) → moles Ca(OH)2

Given:

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Problem Details

Calcium hydroxide and hydrobromic acid react together in the following reaction.

Ca(OH)2 (aq) + HBr (aq) → CaBr2 (aq) + H2O (l)

25.00 mL of 1.50 M HBr are needed to titrate 32.801 mL of Ca(OH)2. What is the molarity of Ca(OH)2?

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