Question

What is the role of concentrated $H_{2}S{O}_4$ in the laboratory preparation of nitric acid?

• A. More volatile base
• B. Less volatile base
• C. Less volatile acid
• D. More volatile acid

Answer 1

The correct option is C

Less volatile acid

In the preparation of nitric acid in the laboratory potassium nitrate and concentrated sulphuric acid is used. Concentrated sulphuric acid act as a less volatile acid in the laboratory preparation of nitric acid. Nitric acid is produced in the lab by heating potassium nitrate and concentrated sulphuric acid in a retort.