a. H2CO3 (carbonic acid) and NaOH (sodium hydroxide)
H2CO3 is a weak acid because it partially dissociates in water, producing H+ and HCO3- ions. NaOH is a strong base because it completely dissociates in water, producing Na+ and OH- ions. Therefore, this pair consists of a weak acid (H2CO3) and a strong base (NaOH).
b. HCl (hydrochloric acid) and NH3 (ammonia)
HCl is a strong acid because it completely dissociates in water, producing H+ and Cl- ions. NH3 is a weak base because it partially dissociates in water, producing NH4+ and OH- ions. Therefore, this pair does not consist of a weak acid and a strong base.
c. CH3COOH (acetic acid) and KOH (potassium hydroxide)
CH3COOH is a weak acid because it partially dissociates in water, producing H+ and CH3COO- ions. KOH is a strong base because it completely dissociates in water, producing K+ and OH- ions. Therefore, this pair consists of a weak acid (CH3COOH) and a strong base (KOH).
Based on the analysis, the pairs that consist of a weak acid and a strong base are:
a. H2CO3 (carbonic acid) and NaOH (sodium hydroxide)
c. CH3COOH (acetic acid) and KOH (potassium hydroxide)
