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JAMB Chemistry 1997 Question 17

Question 17

Solubility and Solutions

A saturated solution of AgCl was found to have a concentration of 1.30 x 10−5 mol dm−3. The solubility product of AgCl therefore is

  1. A.1.30 x 10−5 mol2 dm−6
  2. B.1.30 x 10−7 mol2 dm−6
  3. C.1.69 x 10−10 mol2 dm−6
  4. D.2.60 x 10−12 mol2 dm−6.
Show the answer and explanation

Answer: C (1.69 x 10−10 mol2 dm−6)

Explanation

AgCl gives one Ag+ and one Cl−, so Ksp = (1.30 × 10−5)2 = 1.69 × 10−10 mol2 dm−6.