Pyridine is a weak base that is used in the manufacture ofpesticides and plastic resins. It is also a component of cigarettesmoke. Pyridine ionizes in water as follows:
C5H5N+H2O⇌C5H5NH++OH−
a) The pKb of pyridine is 8.75. What is the pH of a0.440 M solution of pyridine?
Benzoic acid is a weak acid that has antimicrobial properties.Its sodium salt, sodium benzoate, is a preservative found in foods,medications, and personal hygiene products. Benzoic aciddissociates in water:
C6H5COOH⇌C6H5COO−+H+
b) The pKa of this reaction is 4.2. In a 0.63M solution of benzoic acid, what percentage of themolecules are ionized?
