Question

Write a net ionic equation for the reaction that occurs when solid nickel(II) carbonate is combined with excess aqueous hydroiodic acid.

a) NiCO₃(s) + 2HI(aq) -> NiI₂(aq) + H₂O(l) + CO₂(g)
b) NiCO₃(s) + 2H+(aq) -> Ni₂+(aq) + H₂O(l) + CO₂(g)
c) NiCO₃(s) + 2H+(aq) -> NiI₂(aq) + H₂O(l) + CO₂(g)
d) NiCO₃(s) + 2I-(aq) -> NiI₂(aq) + CO₂(g)