The solubility curve of a solid X (molecular mass = 160) is ...
The solubility curve of a solid X (molecular mass = 160) is as show above. 1,000 cm3 of a saturated solution of X at 80°C is cooled to 40°C . The weight of X crystalized out would be
A.
10 g
B.
12 g
C.
14 g
D.
16 g
E.
18 g
Correct answer is D
At 80°C, we have 1000cm3=0.4mol/cm3
40°C = 0.3mol/cm3
hence, the loss in concentration = 0.1mol/cm3
= 0.1×160=16g
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