Answer:
After neutralizing the sodium hydroxide solution with hydrochloric acid, the student should remove any excess hydrochloric acid and water from the solution to obtain a pure solution of sodium chloride. This can be done by a process called evaporation or by using a separating funnel.
To prepare a pure solution of sodium chloride, the student should follow the steps below:
Transfer the neutralized solution of sodium chloride into an evaporating dish.
Heat the evaporating dish over a low flame, stirring continuously until all the water evaporates.
Once all the water has evaporated, the student will be left with a dry residue of sodium chloride in the evaporating dish.
The sodium chloride can then be transferred to a clean, dry container and stored for use.
Alternatively, the student can use a separating funnel to remove excess hydrochloric acid and water from the solution. In this case, the neutralized solution is transferred to a separating funnel, and an equal volume of water is added. The funnel is then shaken, and the two layers are allowed to separate. The bottom layer containing the excess hydrochloric acid is drained off, leaving behind a pure solution of sodium chloride.
Step-by-step explanation: