Unilorin Post-UTME Chemistry 2022 (Model questions) Question 4

Question 4

Acids, Bases and Salts

Calculate the pH of a solution of 0.0001 moldm−3 hydrochloric acid

  1. A.2
  2. B.4
  3. C.2
  4. D.1
Show the answer and explanation

Answer: B (4)

Explanation

HCl ionises fully, so [H+] = 10−4 mol/dm3 and pH = −log(10−4) = 4.