4 When a solution of sodium chloride is electrolysed:
a) at which electrode is hydrogen released? Why?
b) what test shows the presence of this gas?
c) where has the hydrogen come from? d) how would you show chlorine was produced?
e) what pH change occurs in the solution?
f) what causes this change in pH?
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Answer:
the ph will be chage to neutral means 7.
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