Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Acids react with metals to form hydrogen gas and the respective salt. Iron and dilute $H_2{SO}_4$ react as follows:

$\text{Fe(s)}+{\text{H}}_2{SO}_4\text{(dil)}\to +{\text{FeSO}}_4\text{(aq)}+{\text{H}}_2\text{(g)}$

Hydrogen gas is evolved in this reaction. When hydrogen gas is ignited with a burning matchstick, it puts out the fire with a 'pop' sound.