CH₃COOH (aq) + H₂O (l) ⇌ H₃O+ (aq) + CH₃COO- (aq)
Write the expression for the acid dissociation constant to calculate the concentration of H3O+ in a 2.0 M aqueous solution of acetic acid, CH3COOH. (Note: Ka = 1.8 × 10⁻⁵)
a) Ka = [H₃O+][CH₃COO-]/[CH₃COOH]
b) Ka = [H₃O+]/[CH₃COOH]
c) Ka = [H₃O+]/[CH₃COO-]
d) Ka = [H₃O+][CH₃COOH]/[CH₃COO-]