Salts which dissolve in water with evolution of heat. The effect of temperature on their solubility will be:
Correct answer: B. Decreases with increase in temperature
- A. Increases with increase in temperature
- B. Decreases with increase in temperature
- C. Solubility does not change
- D. In some cases it increases while in others it decreases
Explanation
In exothermic reactions, heat energy is released when the solute dissolves in a solution. Increasing temperature introduces more heat into the system. Following Le Chatelier's Principle, the system will adjust to this excess heat energy by inhibiting the dissolution reaction. Increasing temperature, therefore, decreases the solubility of the solute. An example of a solute that decreases in solubility with increasing temperature is calcium hydroxide, which can be used to treat chemical burns and as an antacid.
Last updated
About Solubility Product
The solubility product constant, Ksp, represents the equilibrium concentrations of ions from a sparingly soluble salt, each raised to its stoichiometric power. Problems involve writing Ksp expressions, calculating molar solubility, applying the common-ion effect and predicting precipitation from the ionic product.
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.
Related questions
A salt AB ionizes as AB = A+ > B- .The solubility product for the salt AB is 4.0 x 10-4. The molar solubility of the salt is:
A saturated solution of a sparingly soluble salt is one in which
A solution can be both____________________?
Concentration of solute molecule when they are in equilibrium with solid substance at particular temperature is called________________?
Dissolution of which of these increases with temperature