Question

Purification of $NaCl$ by the passage of $HCl$ through brine solution is based on which of the following?

• A. Distribution coefficient
• B. Le Chatelier’s principle
• C. Displacement Law
• D. Common ion effect

Answer 1

The correct option is D Common ion effect

Purification of $NaCl$ by the passage of $HCl$ through brine is based on the common ion effect.
$HCl$ is a strong electrolyte and provides an ion $\left(C{l}^{-}\right)$ that is common to that provided by the weak electrolyte. Thus, the ionization of weak electrolytes is suppressed.