Question

(i) Write the name of reactant and product for the reaction: \[ \text{Zn} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2 \uparrow \]
(ii) Write the reaction for thermal dissociation of ammonium chloride and name the substances formed.

Hint:

Ammonium chloride decomposes into ammonia and hydrogen chloride when heated. This is a common example of a thermal decomposition reaction.

Answer 1

(i) Reactant and Product for the reaction:
The reaction is: \[ \text{Zn} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2 \uparrow \] - Reactants: Zinc (Zn) and Sulfuric acid (\(\text{H}_2\text{SO}_4\)) - Products: Zinc sulfate (\(\text{ZnSO}_4\)) and Hydrogen gas (\(\text{H}_2\))
(ii) Thermal dissociation of Ammonium Chloride:
The thermal dissociation of ammonium chloride (\(\text{NH}_4\text{Cl}\)) occurs when it is heated, and it decomposes into ammonia gas (\(\text{NH}_3\)) and hydrogen chloride gas (\(\text{HCl}\)). The reaction is: \[ \text{NH}_4\text{Cl} \xrightarrow{\Delta} \text{NH}_3 + \text{HCl} \] - Substances formed: Ammonia (\(\text{NH}_3\)) and Hydrogen chloride (\(\text{HCl}\))
Conclusion:
1. In the first reaction, the reactants are zinc and sulfuric acid, and the products are zinc sulfate and hydrogen gas. 2. In the second reaction, ammonium chloride dissociates into ammonia and hydrogen chloride when heated.