The diagram below represents a set up that was used for electrolysis of aqueous copper (II) nitrate.

The diagram below represents a set up that was used for electrolysis of aqueous copper (II) nitrate.


A gas that relights a glowing splint was produced at electrode A.
i) Which electrode is the cathode ? Explain.
ii) State another suitable method for collecting gas X.
iii) Write ionic equations to show reactions that take place at the :
Anode
Cathode
iv) Explain how the identity of the product at the cathode of this electrolysis can be confirmed.
v) Calculate the mass of copper deposited if a constant current of 5 A was passed for 3 hours. (Cu = 63.5, IF = 965000)

Answers

i) B - oxygen gas is liberated as a result of the discharge of OH" ion which are attracted by anode A
hence B becomes the cathode

ii) Over water

iii) Anode


iv) Dissolving in nitric (V) acid and adding excess aqueous ammonia to the solution.
A deep blue solution of [Cu(NH3)4]²⁺ is formed

v)

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maurice.mutuku answered the question on September 18, 2019 at 09:32

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