Answer:
- Ca²⁺ (aq) + CO₃²⁻ (aq) ⟶ CaCO₃ (s)
Explanation:
1. Write the balanced molecular equation(given):
- Ca(NO₃)₂ (aq) + Na₂CO₃ (aq) ⟶ CaCO₃ (s) + 2NaNO₃ (aq)
Notice that I replaced Fe(NO₃)₂ with Ca(NO₃)2 because Fe does not appear in the products.
2. Write the aqueous ionic compounds in form of ions:
- Ca(NO₃)₂ (aq) ⟶ Ca²⁺ (aq) + 2NO₃⁻ (aq)
- Na₂CO₃ (aq) ⟶ 2Na⁺ + CO₃²⁻ (aq)
- 2NaNO₃ (aq) ⟶ 2Na⁺ (aq) + 2NO₃⁻ (aq)
3. Write the overall ionic equation
In the balanced molecular molecular equation, substitute the ionic compounds with the corresponding ions:
Ca²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺ (aq) + CO₃²⁻(aq) →
CaCO₃(s) + 2NO₃⁻(aq) + 2Na⁺(aq)
4. Write the net ionic equation
Remove the spectator ions (those that appear equal on both sides):
- Ca²⁺ (aq) + CO₃²⁻ (aq) → CaCO₃ (s) ← answer
