Question

The carbonate of which of the following cation is insoluble in water?

• A. ${\text{Na}}^{\text{+}}$
• B. ${\text{K}}^{\text{+}}$
• C. ${\text{NH}}_{\text{4}}^{\text{+}}$
• D. ${\text{Ca}}^{\text{2+}}$

Answer 1

Answer: (D)

Alkali metal carbonates and ammonium carbonate are soluble in water.
All other carbonates are insoluble in water.