Question 18: [Physical > Electrochemistry]:
In the industrial electrolysis of brine to manufacture chlorine, the diaphragm used is a porous screen which allows the flow of electrolytes but keeps other chemicals separate.
Which substance needs to be kept separate from the chlorine by the diaphragm?
A hydrogen
B sodium hydroxide
C sodium chloride
D water
Reference: Past Exam Paper – November 2002 Paper 1 Q13
Solution 18:
Answer: B.
Sodium hydroxide needs to be separated since it is the only choice that can react with the chlorine formed.
Hiç yorum yok:
Yorum Gönder