The concentration of vitamin $C$ in the grapefruit juice is

mmo$\frac{l}{L^{**}}$

$1$ point

The concentration of vitamin $C,C_6{H}_8{O}_6(aq),$ in a sample of grapefruit juice can be measured by titration with an aqueous iodine solution, using starch as an indicator. When unreacted iodine is present, the starch forms a purple complex. The titration reaction is represented by the following equation.

$C_6{H}_8{O}_6(aq)+I_2(aq)C_6{H}_6{O}_6(aq)+2H^{+}(aq)+2I^{-}(aq)$

In an experiment to determine the vitamin $C$ concentration in grapefruit juice, a student titrates $10\mathrm{.}00mL$ samples of grapefruit juice with a $0\mathrm{.}100mo\frac{l}{L_2}($aq$)$ solution. The student records the following data.

Volume of $I_2(aq)$ Used During the Titration

$\backslash$table$[[$Trial$,$I,II$,$III,IV$],[$Final burette reading $(mL),29\mathrm{.}69,49\mathrm{.}12,29\mathrm{.}51,48\mathrm{.}93],[$Initial burette reading $(mL),10\mathrm{.}17,29\mathrm{.}69,10\mathrm{.}00,29\mathrm{.}51]]$

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