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JAMB Chemistry 2020 Question 2

Question 2

Acids, Bases and Salts

Calculate the number of moles of (H+) present in 1dm3 of 0.5m solution of H2SO4?

  1. A.1.0 mole
  2. B.2.0 moles
  3. C.0.5 mole
  4. D.0.25 mole
Show the answer and explanation

Answer: A (1.0 mole)

Explanation

1 dm3 of 0.5 M H2SO4 holds 0.5 mol of acid. Each H2SO4 gives 2H+, so there are 2 × 0.5 = 1.0 mol of H+.