17. Acid and Base Equilibrium
pH of Weak Acids
17. Acid and Base Equilibrium pH of Weak Acids
22PRACTICE PROBLEM
The equilibria of the amino acid alanine, H2N-CH3CH-COOH, in the water are
H2N-CH3CH-COOH + H2O ⇌ H2N-CH3CH-COO- + H3O+ Ka = 4.47x10-3
H2N-CH3CH-COOH + H2O ⇌ +H3N-CH3CH-COOH + OH- Kb = 7.41x10-5
Calculate the pH of a 0.090 M alanine solution
The equilibria of the amino acid alanine, H2N-CH3CH-COOH, in the water are
H2N-CH3CH-COOH + H2O ⇌ H2N-CH3CH-COO- + H3O+ Ka = 4.47x10-3
H2N-CH3CH-COOH + H2O ⇌ +H3N-CH3CH-COOH + OH- Kb = 7.41x10-5
Calculate the pH of a 0.090 M alanine solution