Question

The following questions pertain to the laboratory preparation of hydrogen chloride gas.
(iii) State a safety precaution taken during the preparation of hydrochloric acid

Answer 1

The safety precautions taken during the preparation of hydrochloric acid are:

• Temperature should be maintained at nearly ${200}^{\circ }C$.
• Delivery tube should be dipped in a drying agent i.e., $\text{conc.}{H}_{2}S{O}_4$.
• The lower end of the thistle funnel must be dipped in conc. sulphuric acid.