Solubility of KCIO; can be decreased in H2O by:
Correct answer: C. Adding KCl from outside
- A. Removing K+ ions from the solution
- B. Removing ClO3- ions from the solution
- C. Adding KCl from outside
- D. Adding NaNO3 from outside
Explanation
Explanation:Adding KCl would increase the K+ ion concentration thus shifting the equilibrium to the left due to common ion effect, thus decreasing solubility of KClO3.Removing K+ ions from the solution, would increase the solubility of KClO3, as there would be less competition for the water molecules by K+ ions. Removing ClO3-1 ions from the solution, would also increase the solubility of KClO3, as there would be fewer anions in the solution to repel the ClO3-1 ions. Adding NaNO3 from outside, would not have any effect on the solubility of KClO3, as it is a different compound and does not interact with KClO3 in water to affect its solubility.
Last updated
About Common Ion Effect
The common ion effect is the reduction in the ionisation of a weak electrolyte or the solubility of a sparingly soluble salt when a solution already contains one of its ions. Questions apply Le Chatelier's principle, equilibrium constants and solubility product expressions to predict the shift and calculate concentrations.
Practise Chemical Equilibrium
625 free Chemical Equilibrium MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.