What change will be caused by addition of a small amount of KOH to a solution co

Question

What change will be caused by addition of a small amount of KOH to a solution containing fluoride ions and hydrogen fluoride?

A) The concentration of hydronium ions will increase significantly.

B) The concentration of fluoride ions will increase as will the concentration of hydronium ions.

C) The concentration of hydrogen fluoride will decrease and the concentration of fluoride ions will increase.

D) The concentration of fluoride ion will decrease and the concentration of hydrogen fluoride will increase.

E) The fluoride ions will precipitate out of solution as its acid salt.

Explanation / Answer

The answer is C) The concentration of hydrogen fluoride will decrease and the concentration of fluoride ions will increase. Because when KOH and HF react to form KF which will increase F- and HF will decrease.

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