Question

(a) Define pH.
(b) State three applications of the pH scale.

Answer 1

(a) pH is defined as the scale of acidity that is used in determining the acidic or basic (alkaline) nature of a solution.
(b) Three applications of the pH scale:
(i) It is useful in determining the acidic and basic nature of water; it helps in water treatment and its purification.
(ii) It helps in determining ​the acidic and basic nature of soil; it also helps in crop production.
(iii) It is useful in the pharmaceutic and medicinal fields.