5: synthesis of a halogenoalkane Flashcards
1
Q
Why is a separating funnel used?
A
To separate the immiscible liquids
2
Q
Why is sodium hydrogencarbonate added?
A
To neutralise any excess acid
3
Q
Why is the aqueous layer at the bottom?
A
It has a greater density than the organic layer
4
Q
Why might the organic product be cloudy?
A
Contains water - impure
5
Q
What is the purpose of adding sodium sulfate?
A
To absorb water (drying agent)
6
Q
What is the purpose of adding anti-bumping granules?
A
Prevent large bubbles from forming
7
Q
Why must water enter the condenser at the bottom and leave at the top?
A
So the water fills the condenser, so the tube is cold throughout
8
Q
How could the apparatus be changed to improve the yield of the H-alkane obtained?
A
- put in an ice bath at the end
- to stop volatile liquids evaporating
