The pKa of CH₃COOH is 4.8.If the pH of an aqueous solution of CH₃COOH and CH₃COO^- is 4.8,then one knows

Question

Quizplus · Accepted Answer

At pH 4.8, the solution is at the same pH as the pKa of CH₃COOH, which means that half the CH₃COOH molecules will be in the ionized form (CH₃COO-) and half will be in the unionized form (CH₃COOH). However, since the solution contains both CH₃COOH and its conjugate base CH₃COO^-, the concentrations of each must be equal at equilibrium. Therefore, [CH₃COOH] = [CH₃COO^-] and the correct choice is C.

The PKa of CH3COOH Is 4

The PKa of CH₃COOH Is 4