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12 g of solid protassium chlorate (KCIO) were added to 40 g of water and...

Chemistry
JAMB 1979

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
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Correct Answer: Option E
Explanation

solubility = \(\frac{solute x 100}{solvent}\)

The solubility of KClO3 at 66oC will be \(\frac{12}{40} \times \frac{100}{1}\)

= 30


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