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JAMB Chemistry 2017 Question 2

Question 2

Solubility and Solutions

At room temperature (300 K) in fig 1

Diagram for this question
  1. A.Y is twice as soluble as X.
  2. B.X is twice as soluble as Y
  3. C.X and Y are soluble to the same extent
  4. D.X is three times as soluble as Y
Show the answer and explanation

Answer: A (Y is twice as soluble as X.)

Explanation

Reading the graph at 300 K, Y dissolves about 40 g per 100 g of water and X about 20 g, so Y is twice as soluble as X.