Topic Details (Notes format)

Common Ion Effect

Subject: Chemistry

Book: General Chemistry

The common ion effect states that the solubility of an ionic compound decreases in the presence of a common ion. For instance, adding NaCl to a solution of AgCl reduces its solubility because [Cl–] is already elevated. This effect is used in qualitative analysis (selective precipitation) and buffer solutions, where the addition of a conjugate base or acid helps stabilize pH.

Practice Questions

Which element is a key component of DNA and RNA?

View Question

Which element has the atomic number 26?

View Question

Which element has the atomic number 79?

View Question

What is the chemical formula for magnesium sulfate?

View Question

Which element is represented by the symbol 'Cu'?

View Question

What is the chemical formula for sodium hydroxide?

View Question

Which element has the highest melting point?

View Question

Which element is represented by the symbol 'S'?

View Question

What is the chemical formula for sulfuric acid?

View Question

Which element is used in lithium-ion batteries?

View Question