Question

What is the total ionic equation for the following reaction?

H2CrO4 + Ba(OH)2

H2CrO4– + 2OH– mc001-1.jpg CrO4– + 2H2O

2H+ + CrO4– + 2OH– mc001-2.jpg CrO4– + 2H2O

2H+ + CrO4– + Ba2+ + 2OH– mc001-3.jpg Ba2+ + CrO4– + 2H2O

Answer 1

Molecular equation:
H2CrO4(aq) + Ba(OH)2(aq) → BaCrO4(s) + 2 H2O(l)

Complete (total) ionic equation (all strong electrolytes dissociated):
2 H+(aq) + CrO4^2−(aq) + Ba^2+(aq) + 2 OH−(aq) → BaCrO4(s) + 2 H2O(l)

Net ionic form (showing precipitation and neutralization):
Ba^2+(aq) + CrO4^2−(aq) → BaCrO4(s)
2 H+(aq) + 2 OH−(aq) → 2 H2O(l)

(You can also combine these into one net ionic equation — it is the same as the complete ionic equation above.)