Given the following information, which of these acids is the weakest? K_a of boric acid is 7.3 × 10⁻¹⁰.
PK_a of acetic acid is 4.75.
K_a of lactic acid is 8.4 × 10⁻⁴.
PK_a of phenol is 9.89.

Question

Quizplus · Accepted Answer

The weaker the acid, the higher the value of KS or the lower the value of PKa. Among the given options, phenol has the highest PKa value of 9.89, indicating that it is the weakest acid.

Given the Following Information, Which of These Acids Is the Weakest