Question $8(1$ point$)$

When a sample of the aqueous layer with a volume of $10\mathrm{.}59mL$ is collected, it

requires $20\mathrm{.}81mL$ of a titrant solution of $S_2{O}_3^{2-}$ with a concentration of $0\mathrm{.}01163M$

to reach the endpoint. The reaction has a $2$:$1$ mole ratio of thiosulfate to all

reducible iodine species. Calculate the concentration of total reducible iodine $($in

$mo\frac{l}{L})$ in the aqueous layer. Include only the numerical answer $($no units$).$

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Question $9(1$ point$)$

When a sample of the $C{H}_{2}C{l}_2$ layer with a volume of $8\mathrm{.}47mL$ is collected, it requires

$17\mathrm{.}15mL$ of a titrant solution of $S_2{O}_3^{2-}$ with a concentration of $0\mathrm{.}01726M$ to reach

the endpoint. The reaction has a $2$:$1$ mole ratio of thiosulfate to iodine. Determine

the concentration $($in $mo\frac{l}{L})$ of iodine in the dichloromethane layer. Include only the

numerical answer $($no units$).$

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