12 g of solid protassium chlorate (KCIO) were added to 40 g of water and heated to dissolve all the solid. As the solution cools, crystals of potassium chlorate at 66 oC. The solubility of potassium chlorate at 66 oC is therefore?
A
66
B
33
C
10
D
20
E
30
Verified Correct Answer: E.
Chemical Principles & Mechanism
solubility = \(\frac{solute x 100}{solvent}\)
The solubility of KClO3 at 66oC will be \(\frac{12}{40} \times \frac{100}{1}\)
= 30
Source: WAEC / JAMB / NECO Classroom Archive (Record #27524)