Which of the following factors of an acidic solution would affect its pH?

Question

I. The strength of the acid

II. The concentration  of the acid 

III. The temperature 

 

A. I and II only 

B. II and III only 

C. I and III only 

D. I, II, and III

Answer 1

Assuming the same concentration, a strong acid will have a lower pH than a weak acid, so the strength will affect pH.

The more concentrated an acid, the lower will be the pH, all other factors being equal.

The temperature will affect the pH (higher temp, lower pH) as it will increase the activity (concentration) of H₃O⁺.

Thus the answer would be D.

Answer 2

D, pH decreases with an increase in temperature, but the solution is not any more acidic