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Question
Is it possible to store copper sulphate in an iron vessel for a long time?
Given: \[\ce{E^0_{{Cu^{2+}|{Cu}}}}\] = 0.34 V and \[\ce{E^0_{{Fe^{2+}|{Fe}}}}\] = −0.44 V
Solution
\[\ce{(E^0_{ox})_{{{Fe|{Fe^{2+}}}}}}\]= −0.44 V and \[\ce{(E^0_{red})_{{{Cu^{2+}|{Cu}}}}}\] = 0.34 V
These +ve emf values show that iron will oxidise and copper will get reduced i.e., the vessel will dissolve. Hence it is not possible to store copper sulphate in an iron vessel.
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