Question

Classify each of the following as a Strong acid (sa) or a Weak acid (wa) and indicate how each should be written in aqueous solution. Classify ... In solution this acid should be written as: 1. hydrocyanic acid 2. hypochlorous acid 3. hydrochloric acid

Answer 1

Hydrocyanic acid and hydrochloric acid are strong acids and should be written as HCN(aq) and HCl(aq), respectively, in aqueous solution. Hypochlorous acid is a weak acid and should be written as HOCl(aq) in aqueous solution.

Step-by-step explanation:

According to the information provided, a strong acid is an acid that completely ionizes in an aqueous solution, while a weak acid only ionizes slightly. Hydrocyanic acid and hydrochloric acid are both strong acids because they fully ionize in water. Therefore, they should be written as HCN(aq) and HCl(aq) in aqueous solution. On the other hand, hypochlorous acid is a weak acid because it only ionizes partially. Thus, it should be written as HOCl(aq) in aqueous solution.

Answer 2

1. wa. Molecular form.

2. wa. Molecular form.

3. sa. Ionic form.

Step-by-step explanation:

1. hydrocyanic acid

HCN is a weak acid. That means that in the following equilibrium, the molecular form (HCN(aq)) is favored, and that's how it should be written in solution.

HCN(aq) ⇄ H⁺(aq) + CN⁻(aq)

2. hypochlorous acid

HClO is a weak acid. That means that in the following equilibrium, the molecular form (HClO(aq)) is favored, and that's how it should be written in solution.

HClO(aq) ⇄ H⁺(aq) + ClO⁻(aq)

3. hydrochloric acid

HCl is a strong acid. That means that it completely dissociates and it should be written in the ionic form (H⁺(aq) + Cl⁻(aq)) when it is in solution.

HCl(aq) → H⁺(aq) + Cl⁻(aq)