passwella.
Menu

JAMB Chemistry 1999 Question 22

Question 22

Acids, Bases and Salts

The solution with the lowest pH value is

  1. A.5 ml of M/10 HCl
  2. B.10 ml of M/10 HCl
  3. C.15 ml of M/5 HCl
  4. D.20 ml of M/8 HCl.
Show the answer and explanation

Answer: C (15 ml of M/5 HCl)

Explanation

pH depends on the concentration of H+, not the volume. M/5 (0.2 M) is the most concentrated acid, so it has the lowest pH.