passwella.
Menu

JAMB Chemistry 2004 Question 18

Question 18

Solubility and Solutions

The solubility in mol dm-3 of 20g of CuSO4 dissolved in 100g of water at 180°C is [Cu = 64, S = 32, O = 16]

  1. A.0.13
  2. B.0.25
  3. C.1.25
  4. D.2.00
Show the answer and explanation

Answer: C (1.25)

Explanation

CuSO4 = 160 g/mol, so 20 g = 0.125 mol in 100 g (about 100 cm3) of water. Per 1000 cm3: 0.125 × 10 = 1.25 mol dm-3.