Chemistry 10th Edition

Published by Brooks/Cole Publishing Co.
ISBN 10: 1133610668
ISBN 13: 978-1-13361-066-3

Chapter 11 - Reactions in Aqueous Solutions II: Calculations - Exercises - Mixed Exercises - Page 397: 76

Answer

$V(HCl)=464.1ml$

Work Step by Step

The following is the neutralization reaction of hydrochloric acid by calcium hydroxide: $2HCl + Ca(OH)_{2} \rightarrow CaCl_{2} + 2H_{2}O$ By considering stoichiometric coefficients, we can observe that the amount of hydrochloric acid required is twice the amount of calcium hydroxide. Hence, $n(HCl)=2n(Ca(OH)_{2})=2\times \frac{m(Ca(OH)_{2})}{M(Ca(OH)_{2})}=2\times \frac{1.98g}{74\frac{g}{mol}}=0.0535mol$ We can obtain the volume of $HCl$ solution knowing its concentration: $V(HCl)=\frac{n(HCl)}{c(HCl)}=\frac{0.0535mol}{0.1153\frac{mol}{dm^3}}=0.4641dm^3=464.1ml$
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