Mg(NO₃)₂ + Na₂CO₃ = MgCO₃↓ + 2NaNO₃ Mg²⁺ + 2NO₃⁻ + 2Na⁺ + CO₃²⁻ = MgCO₃↓ + 2Na⁺ + 2NO₃⁻ Mg²⁺ + CO₃²⁻ = MgCO₃↓