Fewpal
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in Chemistry by (29.7k points)

Consider the reactions: 

(a) H3PO2(aq) + 4AgNO3(aq) + 2H2O(l) → H3PO4(aq) + 4Ag(s) + 4HNO3(aq) 

(b) H3PO2(aq) + 2CuSO4(aq) + 2H2O(l) → H3PO4(aq) + 2Cu(s) + H2SO4(aq) 

(c) C6H5CHO(l) + 2[Ag (NH3)2] +(aq) + 3OH(aq) → C6H5COO(aq) + 2Ag(s) + 4NH3(aq)   + 2H2O(l) 

(d) C6H5CHO(l) + 2Cu2+(aq) + 5OH (aq) → No change observed. 

What inference do you draw about the behaviour of Ag+ and Cu2+ from these reactions? 

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1 Answer

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Ag+ and Cu2+ act as oxidising agents in reactions (a) and (b) respectively. 

In reaction (c), Ag+ oxidises C6H5CHO to C6H5COO , but in reaction (d), Cu2+ cannot oxidise C6H5CHO. Hence, we can say that Ag+ is a stronger oxidising agent than Cu2+

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