Question

What is the effect on the concentration of hydrofluoric acid, hydronium ion, and fluoride ion when the following are added to separate solutions of hydrofluoric acid?

a) Increase in HF, increase in H₃O⁺, decrease in F⁻
b) Increase in HF, decrease in H₃O⁺, increase in F⁻
c) Decrease in HF, increase in H₃O⁺, decrease in F⁻
d) Decrease in HF, decrease in H₃O⁺, increase in F⁻

Answer 1

When hydrofluoric acid is added to a solution, the concentration of HF and H₃O⁺ ions will increase, while the concentration of F⁻ ions will decrease.

Step-by-step explanation:

When hydrofluoric acid is added to a solution:

The concentration of hydrofluoric acid (HF) will increase.

The concentration of hydronium ions (H₃O⁺) will increase.

The concentration of fluoride ions (F⁻) will decrease.

Therefore, the correct answer is (a) Increase in HF, increase in H₃O⁺, decrease in F⁻.