What is the net ionic equation for Fe (NO 3) 2 (aq) + Na 2 CO 3 (aq) ⟶ CaCO3 (s) + 2 NaNO 3 (aq)

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