What is the effect of adding a common ion on the solubility of a salt? (2020)

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Question: What is the effect of adding a common ion on the solubility of a salt? (2020)

Options:

Correct Answer: Decreases solubility

Exam Year: 2020

Solution:

Adding a common ion decreases the solubility of a salt due to the common ion effect, which shifts the equilibrium to the left.

What is the effect of adding a common ion on the solubility of a salt? (2020)

What is the effect of adding a common ion on the solubility of a salt? (2020)

Step 1: Understand what a salt is. A salt is a compound formed from the reaction of an acid and a base.
Step 2: Know what solubility means. Solubility is how much of a substance can dissolve in a liquid.
Step 3: Learn about common ions. A common ion is an ion that is already present in a solution and is also part of the salt.
Step 4: Recognize the concept of equilibrium. In a solution, there is a balance between dissolved ions and undissolved salt.
Step 5: Understand the common ion effect. When you add a common ion to the solution, it disturbs the balance.
Step 6: Realize that adding a common ion shifts the equilibrium to the left, meaning more undissolved salt forms.
Step 7: Conclude that this shift decreases the solubility of the salt in the solution.

No concepts available.