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A \( 2.024 \mathrm{~g} \) sample containing \( \mathrm{Ba}(\mathrm{SCN})_{2} \) was dissolved in a bicarbonate solution. \( 50.0 \mathrm{~mL} \) of \( 1 \mathrm{~N} \) iodine solution was added, and the mixture was allowed to stand for five minutes. The solution was then acidified,
\( \mathrm{P} \) and the excess \( \mathrm{I}_{2} \) was titrated with \( 26 \mathrm{~mL} \) of \( 1 \mathrm{M} \) sodium thiosulphate. Write a balanced equation for the

W oxidation of \( \mathrm{SCN}^{-} \)into \( \mathrm{SO}_{4}^{2-} \) and \( \mathrm{HCN} \). Calculate the percent \( \mathrm{Ba}(\mathrm{SCN})_{2} \) in the sample.
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