Concept explainers
The solubility product of
Interpretation:
The molar solubility of
Concept introduction:
The amount of solute dissolved in a given volume of the solvent to form a saturated solution at a given temperature is termed as solubility of the solute in the solvent at that temperature.
The solubility product of the sparingly soluble salt is given as the product of the concentration of the ions raised to the power equal to the number of times the ion occurs in the equation, after dissociation of the electrolyte.
Number of moles of solute dissolved per litre of solution is called molar solubility.
At a given temperature, the product of molar concentrations of the ions of a salt present in the solution is known as the solubility product of the salt. It is represented by
Higher is the value of solubility product of a salt, higher is its solubility.
The presence of common ions in the solution decreases the solubility of a given compound.
For a general reaction:
The solubility product can be calculated by the expression as:
Here,
The molar solubility of a compound is directly proportional to the number of molecules present in the given amount of solvent.
Answer to Problem 63QP
Solution:
The molar solubility of
The molar solubility of
The molar solubility of
Explanation of Solution
a) Pure water
Thesolubility product constant of
The equation of the dissociation of
Consider s to be the molar solubility.
The molar solubility of
Summarize the concentration at the equilibrium as follows:
The equilibrium expression for a reaction is written as follows:
Here,
Substitute the value of
Hence, the molar solubility of
b)
The solubility product constant of
The molar solubility of
The equation of the dissociation of
Summarize the concentration at the equilibrium as follows:
Therefore, the concentration of
Summarize the concentration at the equilibrium as follows:
Consider s to be the molar solubility.
The equilibrium expression for a reaction is written as:
Here,
Substitute the value of
The value of s is very small as compared to 0.20. It can be neglected.
Hence, the molar solubility of
c)
The solubility product constant of
The molar solubility of
The equation of the dissociation of
Summarize the concentration at the equilibrium as follows:
The concentration of
Summarize the concentration at the equilibrium as follows:
Consider s to be the molar solubility.
The equilibrium expression for a reaction is written as:
Here,
Substitute the value of
The value of s is very small as compared to 0.20. It can be neglected.
Hence, the molar solubility of
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Chapter 17 Solutions
Looseleaf Study Guide For Chemistry
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