Write a net ionic equation for the reaction that occurs when zinc carbonate (s) and excess hydroiodic acid are combined.

Question

Write a net ionic equation for the reaction that occurs when zinc carbonate (s) and excess hydroiodic acid are combined.

Answer 1

Hi Emily,

First write the balanced equation:

2 HI (aq) + ZnCO₃ (s) → ZnI₂ (aq) + H₂O (l) + CO₂ (g)

*to find the states of matter refer to a solubility chart

Now separate only the aqueous (aq) into ions

2 H⁺ (aq) + 2 I^- (aq) + ZnCO₃ (s) → Zn⁺² (aq) + 2 I^- (aq) + H₂O (l) + CO₂ (g)

Cross off the aq ions that are same on both sides

Net ionic equation:

2 H⁺ (aq) + ZnCO₃ (s) → Zn⁺² (aq) + H₂O (l) + CO₂ (g)

Hope this helps :)