Question

Of the following, which is a reaction demonstrating heterogeneous equilibrium?

Select the correct answer below:
a) 2SO2(g) + O2(g) ⇌ 2SO3(g)
b) PbCl2(s) ⇌ Pb²⁺(aq) + 2Cl⁻(aq)
c) CO2(aq) + H2(aq) + NH3(aq) ⇌ HCO₂⁻(aq) + NH4⁺(aq)
d) CH3CO2H(aq) ⇌ CH3CO2⁻(aq) + H⁺(aq)

Answer 1

The reaction demonstrating heterogeneous equilibrium is PbCl2(s) ⇌ Pb²⁺(aq) + 2Cl⁻(aq).

Step-by-step explanation:

The reaction that demonstrates heterogeneous equilibrium is option b) PbCl2(s) ⇌ Pb²⁺(aq) + 2Cl⁻(aq). In this reaction, the reactant PbCl2 is in the solid state, while the products Pb²⁺ and Cl⁻ are in the aqueous state. Heterogeneous equilibrium occurs when the reactants and products are in different phases or states.