Which of the following solutions would have the highest pH? Assume that they are all 0.10 mol L^-1in acid at 25 ^∘C? The acid is followed by its K_a value. A)HF, 3.5 × 10^-4 B)HCN, 4.9 × 10^-10 C)HNO₂, 4.6 × 10^-4 D)HCHO₂, 1.8 × 10^-4 E)HClO₂, 1.1 × 10^-2

Question

Quizplus · Accepted Answer

The solution with the highest pH will be the weakest acid, which has the smallest K_a value. HCN has the smallest K_a value (4.9 × 10^-10), making it the weakest acid and resulting in the highest pH.

Which of the Following Solutions Would Have the Highest PH