Final answer:
The complete ionic equations for the given reactions are: (a) 2K⁺ (aq) + C₂O₄²⁻ (aq) + Ba²⁺ (aq) + 2OH⁻ (aq) ⟶ Ba²⁺ (aq) + C₂O₄²⁻ (aq) + 2K⁺ (aq) + 2OH⁻ (aq), (b) 2Pb²⁺ (aq) + 2NO₃⁻ (aq) + 2H⁺ (aq) + SO₄²⁻ (aq) ⟶ PbSO₄ (s) + 2H⁺ (aq) + 2NO₃⁻ (aq), and (c) Ca²⁺ (aq) + CO₃²⁻ (aq) + 2H⁺ (aq) + SO₄²⁻ (aq) ⟶ CaSO₄ (s) + CO₂ (g) + H₂O (l).
Step-by-step explanation:
In order to write the complete ionic equation, we need to break down the reactants and products into their constituent ions.
(a) The complete ionic equation for the reaction between K₂C₂O₄ (aq) and Ba(OH)₂ (aq) is:
2K⁺ (aq) + C₂O₄²⁻ (aq) + Ba²⁺ (aq) + 2OH⁻ (aq) ⟶ Ba²⁺ (aq) + C₂O₄²⁻ (aq) + 2K⁺ (aq) + 2OH⁻ (aq)
(b) The complete ionic equation for the reaction between Pb(NO3)₂ (aq) and H₂SO₄ (aq) is:
2Pb²⁺ (aq) + 2NO₃⁻ (aq) + 2H⁺ (aq) + SO₄²⁻ (aq) ⟶ PbSO₄ (s) + 2H⁺ (aq) + 2NO₃⁻ (aq)
(c) The complete ionic equation for the reaction between CaCO₃ (s) and H₂SO₄ (aq) is:
Ca²⁺ (aq) + CO₃²⁻ (aq) + 2H⁺ (aq) + SO₄²⁻ (aq) ⟶ CaSO₄ (s) + CO₂ (g) + H₂O (l)