Write the net ionic equation for the following molecular equation HI is a strong electrolyte. HCN is a weak electrolyte. NaCN (aq) + HI (aq) rightarrow NaI (aq) + HCN (aq) (Use the lowest possible coefficients. Use the pull-down boxes to specify states such as (aq) or (s). If a box is not needed, leave blank.)

CN⁻ (aq) + H⁺ (aq) ⇒ HCN (aq)

Explanation:

Let's consider the following molecular equation.

NaCN (aq) + HI (aq) ⇒ NaI (aq) + HCN (aq)

HI is a strong electrolyte so it exists mostly in the ionic form. HCN is a weak electrolyte so it exists mostly in the molecular form.

The full ionic equation includes all the ions and the molecular species.

Na⁺ (aq) + CN⁻ (aq) + H⁺ (aq) + I⁻ (aq) ⇒ Na⁺ (aq) + I⁻ (aq) + HCN (aq)

The net ionic equation includes only the ions that participate in the reaction and the molecular species.

CN⁻ (aq) + H⁺ (aq) ⇒ HCN (aq)