Question

Write a net ionic equation for the reaction between aqueous solutions of (a) ammonia and hydrofluoric acid. (b) perchloric acid and rubidium hydroxide. (c) sodium sulfite and hydriodic acid. (d) nitric acid and calcium hydroxide.

Short answer

Question: Write the net ionic equation for each of the following reactions: (a) Ammonia and hydrofluoric acid (b) Perchloric acid and rubidium hydroxide (c) Sodium sulfite and hydriodic acid (d) Nitric acid and calcium hydroxide Answer: (a) NH3(aq) + HF(aq) → NH4^+(aq) + F^-(aq) (b) H^+(aq) + OH^-(aq) → H2O(l) (c) SO3^2-(aq) + 2H^+(aq) → H2O(l) + SO2(g) (d) 2H^+(aq) + 2OH^-(aq) → 2H2O(l)

Step-by-step solution

Write the balanced molecular equation

NH3(aq) + HF(aq) → NH4F(aq)

Write the total ionic equation

NH3(aq) + HF(aq) → NH4^+(aq) + F^-(aq)

Identify and cancel the spectator ions

There are no spectator ions in this reaction.

Write the net ionic equation

NH3(aq) + HF(aq) → NH4^+(aq) + F^-(aq) (b) Perchloric acid and rubidium hydroxide

Write the balanced molecular equation

HClO4(aq) + RbOH(aq) → RbClO4(aq) + H2O(l)

Write the total ionic equation

H^+(aq) + ClO4^-(aq) + Rb^+(aq) + OH^-(aq) → Rb^+(aq) + ClO4^-(aq) + H2O(l)

Identify and cancel the spectator ions

Spectator ions: Rb^+(aq), ClO4^-(aq)

Write the net ionic equation

H^+(aq) + OH^-(aq) → H2O(l) (c) Sodium sulfite and hydriodic acid

Write the balanced molecular equation

Na2SO3(aq) + 2HI(aq) → 2NaI(aq) + H2O(l) + SO2(g)

Write the total ionic equation

2Na^+(aq) + SO3^2-(aq) + 2H^+(aq) + 2I^-(aq) → 2Na^+(aq) + 2I^-(aq) + H2O(l) + SO2(g)

Identify and cancel the spectator ions

Spectator ions: 2Na^+(aq), 2I^-(aq)

Write the net ionic equation

SO3^2-(aq) + 2H^+(aq) → H2O(l) + SO2(g) (d) Nitric acid and calcium hydroxide

Write the balanced molecular equation

2HNO3(aq) + Ca(OH)2(aq) → Ca(NO3)2(aq) + 2H2O(l)

Write the total ionic equation

2H^+(aq) + 2NO3^-(aq) + Ca^2+(aq) + 2OH^-(aq) → Ca^2+(aq) + 2NO3^-(aq) + 2H2O(l)

Identify and cancel the spectator ions

Spectator ions: Ca^2+(aq), 2NO3^-(aq)

Write the net ionic equation

2H^+(aq) + 2OH^-(aq) → 2H2O(l)