A solution of hydrofluoric acid, HF (aq), is at equilibrium. How would the system change if more HF were added to the solution?

A. Less H + and more F would be produced.

B. More H + and less F would be produced

C. Less H + and F would be produced.

D. More H + and F would be produced.

D. More H + and F would be produced.

More H + and F would be produced.

Option D.

Explanation:

Hydrofluoric acid is one of the strong acid, but not as strong as hydrogen chloride. This is because the fluorine is much small atom which strongly attracts the Electron of hydrogen, but also exhibits covalent bond.

So in solution, hydrogen fluoride partially breaks into hydrogen ions and fluoride ions.

So when in solution, they exhibit an equilibrium between the HF and hydrogen ions and fluoride ions. So when more amounts of hydrogen fluoride is added to solution, the concentration of hydrogen fluoride increases in solution. This shifts the reaction to the reactant side, and hence more dissociation of the hydrogen and fluoride ions will occur and this will produce more hydrogen ions and fluoride ions.