Chemistry

Problem

Per disulphuric acid (

\text{H}_2\text{S}_2\text{O}_8

) can be prepared by electrolytic oxidation of

\text{H}_2\text{SO}_4

2\text{H}_2\text{SO}_4 \rightarrow \text{H}_2\text{S}_2\text{O}_8 + 2\text{H}^+ + 2e.

Oxygen and hydrogen are byproducts. In such an electrolysis 9.72 litre of

\text{H}_2

and 2.35 litre of

\text{O}_2

were generated at STP. What is the mass of

\text{H}_2\text{S}_2\text{O}_8

formed?