A sample of a solution with unknown concentration of barium hydroxide,

CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance

Problem

10.0\text{ cm}^3

sample of a solution with unknown concentration of barium hydroxide,

\mathrm{Ba(OH)_2(aq)}

, was titrated with

0.100\text{ mol dm}^{-3}

hydrochloric acid,

\mathrm{HCl(aq)}

, in the presence of an acid-base indicator. The colour change was observed when

11.7\text{ cm}^3

of the standard solution was added. (1) Formulate the balanced equation for the neutralization if the reaction products are barium chloride,

\mathrm{BaCl_2(aq)}

, and water. (2) Determine the concentration, in

\text{mol dm}^{-3}

, of barium hydroxide in the analysed solution.