CH-2045

Titration calculations

Chemistry · Secondary 4 · Hard · Titration calculations

A sample of sulfur dioxide gas is bubbled into 100

\text{cm}^3

of water. All the gas dissolves. The solution is then titrated with 0.020 mol/dm

^3

iodine solution using the equation:

\text{SO}_2 + 2\text{H}_2\text{O} + \text{I}_2 \rightarrow 4\text{H}^+ + \text{SO}_4^{2-} + 2\text{I}^- .

If 15.0

\text{cm}^3

of iodine solution is required, what is the amount of

\text{SO}_2

(in moles) that dissolved?

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