# 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:

95% (104 ratings) ###### 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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