Q2 of 33 Page 68

Can you store copper sulphate solutions in a zinc pot?

NO, because Zn is very reactive with Cu. It reacts with copper sulphate to form zinc sulphate i.e., Zn displaces Cu and metallic Cu is also formed.


The reaction is given as:


Zn + CuSO4 ⇒ ZnSO4 + Cu


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How would you determine the standard electrode potential of the system Mg2+|Mg?

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Consult the table of standard electrode potentials and suggest three substances that can oxidise ferrous ions under suitable conditions

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Calculate the potential of hydrogen electrode in contact with a solution whose pH is 10.

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Calculate the emf of the cell in which the following reaction takes place:

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