Answer and explanation
It is very important to set-up the apparatus in the fume hood when separating NH4Cl, this is because NH4Cl is moderately hazardous, it can cause irritation, shortness of breath, cough, nausea, and headache. The process of separation produces fumes that can be harmful, so working in the fumehood will help to trap these fumes so that you will not inhale them.
