Which of the following solutions containing one mole per dm³ of the compound would have the lowest PH?

A. ethanoic acid
B. hydrochloric acid
C. sodium chloride
D. sodium hydrogentrioxocarbonate(iv)

Correct Answer:

Option B – hydrochloric acid

Explanation

Low PH means strongly acidic cause acidity increases with decreasing PH values.

Example is Hydrochloric Acid