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JAMB Chemistry 2012 Question 19

Question 19

Acids, Bases and Salts

Which of the following will produce a solution with pH less than 7 at equivalent point?

  1. A.HNO3 + NaOH
  2. B.H2SO4 + KOH
  3. C.HCl + Mg(OH)2
  4. D.HNO3 + KOH
Show the answer and explanation

Answer: C (HCl + Mg(OH)2)

Explanation

A strong acid with a weak base gives a slightly acidic salt solution; Mg(OH)2 is the only weak base here.