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JAMB Chemistry 1997 Question 19

Question 19

Acids, Bases and Salts

Which of the aqueous solutions with the pH values below will liberate hydrogen when it reacts with magnesium metal?

  1. A.13.0
  2. B.7.0
  3. C.6.5
  4. D.3.0
Show the answer and explanation

Answer: D (3.0)

Explanation

Magnesium gives off hydrogen with acids. pH 3.0 is the only clearly acidic solution with plenty of H+ ions.