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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: zachary80 on August 02, 2017, 07:27:58 AM

Title: Electrolysis
Post by: zachary80 on August 02, 2017, 07:27:58 AM

Just wanted to know if i were to do an electrolysis with a potential difference of 4 volts with copper sulphate solution and iron electrodes what would happen. My prediction using the standard reduction table is that iron will undergo oxidisation and copper ions will undergo reduction is this correct? also visibly i presume there will be a build up of copper on the cathode however will there be any discolouration on the anode or in the solution.

All Help appreciated.

Title: Re: Electrolysis
Post by: chenbeier on August 02, 2017, 09:48:47 AM

The anode will be dissolved and you get ironsulfate, better is to us copper as anode.

Title: Re: Electrolysis
Post by: zachary80 on August 02, 2017, 07:51:38 PM

Thanks much appreciated!!!

Title: Re: Electrolysis
Post by: Vidya on August 04, 2017, 01:58:05 AM

Quote from: zachary80 on August 02, 2017, 07:27:58 AM

however will there be any discolouration on the anode or in the solution.

All Help appreciated.

Anode is made up of IRON and will get oxidized as iron ion and replaces Cu²⁺ from the solution.So there is discoloration of the solution color from blue to pale yellow ,size of anode decreases and size of the cathode will increase. Cu²⁺ will come out of solution as Cu after gaining two electrons from cathode and will deposit on the cathode.