When 50 mL of 0.10 M NaF is added to 50 mL of 0.10 M HF,relative to the pH of the 0.10 M HF solution the pH of the resulting solution will
A)become 7.
B)decrease.
C)increase.
D)remain the same.

Question

Quizplus · Accepted Answer

When NaF is added to HF, F- ions react with the H+ ions of HF to form HF2- ions, thereby decreasing the concentration of H+ ions in solution. This shift in equilibrium causes an increase in pH, making the resulting solution more basic. Therefore, pH of the resulting solution will increase.

When 50 ML of 0