Strong Acid - Strong Base, Hydrochloric acid, HCl(aq) - Sodium hydroxide, NaOH(aq)

Strong Acid - Weak Base, Hydrochloric acid, HCl(aq) - Ammonia, NH₃(aq)

Weak Acid - Strong Base, Ethanoic acid, CH₃COOH(aq) - Sodium hydroxide, NaOH(aq)

Weak Acid - Weak Base, Ethanoic acid, CH₃COOH(aq) - Ammonia, NH₃(aq)

Phenolphthalein
pH 8.3 - 10.0 Methyl Orange
pH 3.1 - 4.4 Phenolphthalein, pH 8.3 - 10.0 Methyl Orange, pH 3.1 - 4.4