Which of the following salt solutions will have a pH greater than 7?

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Chemistry WAEC 2001

Which of the following salt solutions will have a pH greater than 7?

  • NaCl(aq)
  • Na2CO3(aq) checkmark
  • Na2SO4(aq)
  • NaHSO4(aq)

The correct answer is: B

Explanation

The pH of a solution of sodium carbonate is greater than 7 because it's a basic salt. When Na2CO3 is dissolved in water, it undergoes hydrolysis, which produces OH- ions, making the solution pH greater than 7.

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