Which of the following is true?

Question

A. HF does not ionize in water to any extent.
B. All are true
C. HF ionizes equally in a solution of KCl as in pure water.
D. HF ionizes more in a solution of NaF than in pure water.

Answer 1

Tough question. Depends upon if you are a beginning student or an advanced student.
A is true since the Ka is about 10^-4 or so.
B is not true for later reasons.
C is true for beginning students. But ionic strength plays a part so not true for advanced students.
D. Not true. In a solution of NaF the ionization of HF is decreased.