In the table below, the acid and conjugate bases are conjugate pairs and the base and conjugate acids are conjugate pairs. When finding a conjugate acid or base, make sure you look at the reactants. The reactants are the acids and bases, and the acid corresponds to theconjugate base on the product side of the equation. This goes for the base too; the base corresponds to the conjugate acid on the product side of the equation.
To identify the conjugate acid, look for the pair of compounds that are related. The acid-base reaction can be view in a before and after sense. The before is the reactant side of the equation, the after is the product side of the equation. The conjugate acid in the after side of an equation gains a hydrogen ion, so in the before side of the equation the compound that has one less hydrogen ion of the conjugate acid is the base. The conjugate base in the after side of the equation lost a hydrogen ion, so in the before side of the equation the compound that has one more hydrogen ion of the conjugate base is the acid.