Question 10
Solubility and SolutionsThe solubility graph of a solid Y (molecular mass=160) as shown below. 1000cm3 of a saturated solution of Y at 80°C is cooled to 40°C. The weight of Y crystalized out would be
- A.12g
- B.16g
- C.18g
- D.14g
Show the answer and explanation
Answer: B (16g)
Explanation
From the graph, solubility is 0.4 mol/dm3 at 80 °C and 0.3 mol/dm3 at 40 °C. 0.1 mol crystallises: 0.1 × 160 = 16 g.