Consider the reactions, I. $$H3PO2(aq)+4AgNO3(aq)+2H2O(l)$$⟶$$H3PO4(aq)+4Ag(s)+4HNO3(aq)$$ II. $$H3PO2(aq)+2CuSO4(aq)+2H2O(l)$$⟶$$H3PO4(aq)+2Cu(s)+2H2SO4(aq)$$ III. $$C6H5CHO(l)+2AgNH32+(aq)+3OH-(aq)$$ ⟶$$C6H5COO-(aq)+2Ag(s)$$ $$+4NH3(aq)+2H2O(l)$$ IV. $$C6H5CHO(l)+2Cu2+(aq)+5OH-(aq)$$⟶ No change observed What inference do you draw about the behaviour of $$Ag+and$$ $$Cu2+from$$ these reactions?

Question

Consider the reactions, I. $$H3PO2(aq)+4AgNO3(aq)+2H2O(l)$$⟶$$H3PO4(aq)+4Ag(s)+4HNO3(aq)$$ II. $$H3PO2(aq)+2CuSO4(aq)+2H2O(l)$$⟶$$H3PO4(aq)+2Cu(s)+2H2SO4(aq)$$ III. $$C6H5CHO(l)+2AgNH32+(aq)+3OH-(aq)$$ ⟶$$C6H5COO-(aq)+2Ag(s)$$ $$+4NH3(aq)+2H2O(l)$$ IV. $$C6H5CHO(l)+2Cu2+(aq)+5OH-(aq)$$⟶ No change observed What inference do you draw about the behaviour of $$Ag+and$$ $$Cu2+from$$ these reactions?

Infinity Learn · Accepted Answer

In (a) and (b) reactions, $$AgNO3$$ and $$CuSO4$$ act as ' oxidizing agents respectively. They oxidize $$H3PO2$$ (hypo$$ phosphorous $$acid) to $$H3PO4$$ (orthophosphoric$$ $$acid). In reaction (c) $$AgNH32+$$ oxidizes benzaldehyde to benzoic acid but in reaction (d), $$Cu2+$$ do not oxidize benzaldehyde (C6H5CHO) to benzoic acid. This indicates that $$Ag+$$ is a stronger oxidizing agent than $$Cu2+$$.

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