Question

Split the following redox reactions in oxidation and reduction half reactions:
$left parenthesis straight a right parenthesis space 2 straight K left parenthesis straight s right parenthesis space plus space Cl subscript 2 left parenthesis straight g right parenthesis space space rightwards arrow space space space 2 KCl left parenthesis straight s right parenthesis left parenthesis straight b right parenthesis space 2 Al left parenthesis straight s right parenthesis space plus space 3 Cu to the power of 2 plus end exponent left parenthesis aq right parenthesis space space rightwards arrow space space space 2 Al to the power of 3 plus end exponent left parenthesis aq right parenthesis space plus space 3 Cu left parenthesis straight s right parenthesis$

Solution

(a) The given reaction
$2 straight K left parenthesis straight s right parenthesis space plus space Cl subscript 2 left parenthesis straight g right parenthesis space space space rightwards arrow space space space 2 KCl left parenthesis straight s right parenthesis can space be space split space into space two space half space reaction space as colon$
(i) Oxidation half-reaction.
$2 straight K space rightwards arrow space space 2 straight K to the power of plus space plus space 2 straight e to the power of minus$
(ii) Reduction half reaction:
   $Cl subscript 2 space plus space 2 straight e to the power of minus space space rightwards arrow space space space 2 Cl to the power of minus$
(b) The given reaction
   $2 Al left parenthesis straight s right parenthesis space plus space 3 Cu to the power of 2 plus end exponent left parenthesis aq right parenthesis space space space rightwards arrow space space space 2 Al to the power of 3 plus end exponent left parenthesis aq right parenthesis space plus space 3 Cu left parenthesis straight s right parenthesis can space be space split space into space two space half space reaction colon$
(i) Oxidation half reaction:
   $2 Al left parenthesis straight s right parenthesis space space rightwards arrow space space space 2 Al to the power of 3 plus end exponent left parenthesis aq right parenthesis space plus 6 straight e to the power of minus$
(ii) Reduction half reaction:
$3 Cu to the power of 2 plus end exponent space plus space 6 straight e to the power of minus space space space rightwards arrow space space space 3 Cu left parenthesis straight s right parenthesis$

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Redox Reactions

Some More Questions From Redox Reactions Chapter

What are redox reactions?

What are direct redox reactions? Give one example.

What are indirect redox reactions?

Write formulas for the following compounds:
(a) Mercury (II) chloride
(b) Nickel (II) sulphate
(c) Tin (IV) oxide
(d) Thallium (I) sulphate
(e) Iron (III) sulphate
(f) Chromium (III) oxide

What are electrolytes?

What are cations and anions?

What is electrolysis?

Mention two uses of electrolysis.

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