Question

Write any two chemical properties of acids. [3 MARKS]

Answer 1

Each point: 1.5 Mark

1. Reaction with metals– Dilute acids like hydrochloric acid (HCl), sulphuric acid react with certain active metals to evolve hydrogen gas and form their metallic salt. For example:

$\text{Zn}+{\text{H}}_2{\text{SO}}_4$ $\to$ $\text{Zn}{\text{SO}}_4\text{(aq)}+{\text{H}}_2\text{(g)}$

2. Reaction with metallic oxide– Metal oxides react with dilute acids to form salt and water. For example:

${\text{Na}}_2\text{O}+{\text{2HNO}}_3$ $\to$ ${\text{2NaNO}}_3\text{(aq)}+{\text{H}}_2\text{O}\text{(l)}$