Why do you need to rinse the walls of a volumetric flask with distilled water after adding a solute?

Question

Question

This question was previously asked in

SSC CHSL Memory Based Test (Held on: 10 August 2023 Shift 1)

To ensure that all solute particles are in the solution and not on the flask wall
To clean the flask
To increase the volume of the solution
To dilute the solution

Answer 1

The correct answer is to ensure that all solute particles are in the solution and not on the flask wall.

Key Points

During the addition of a solute to a flask, some particles might stick to the flask's walls. Rinsing the walls with distilled water helps to wash these particles into the solution.
This step ensures that all of the solute is included in the solution, which is crucial for maintaining the correct concentration and for ensuring accurate experimental results.
This practice is particularly important in analytical chemistry, where precision and accuracy are vital.

Additional Information

A volumetric flask is a type of laboratory glassware. It is used to prepare solutions of precise volumes.
It is characterized by a narrow neck and a flat bottom. The neck has a line (known as the graduation mark) to indicate the volume of the solution the flask is designed to contain.