Identify the substance oxidised,reduced,oxidising agent,and reducing agent for each of the following reactions:
$(a)$ $2AgBr_{(s)} + C_6H_6O_{2(aq)} \to 2Ag_{(s)} + 2HBr_{(aq)} + C_6H_4O_{2(aq)}$
$(b)$ $HCHO_{(l)} + 2[Ag(NH_3)_2]^+_{(aq)} + 3OH^-_{(aq)} \to 2Ag_{(s)} + HCOO^-_{(aq)} + 2NH_{3(aq)} + 2H_2O_{(l)}$
$(c)$ $HCHO_{(l)} + 2Cu^{2+}_{(aq)} + 5OH^-_{(aq)} \to Cu_2O_{(s)} + HCOO^-_{(aq)} + 3H_2O_{(l)}$
$(d)$ $N_2H_{4(l)} + 2H_2O_{2(l)} \to N_{2(g)} + 4H_2O_{(l)}$
$(e)$ $Pb_{(s)} + PbO_{2(s)} + 2H_2SO_{4(aq)} \to 2PbSO_{4(s)} + 2H_2O_{(l)}$
$(a)$ $2AgBr_{(s)} + C_6H_6O_{2(aq)} \to 2Ag_{(s)} + 2HBr_{(aq)} + C_6H_4O_{2(aq)}$
$(b)$ $HCHO_{(l)} + 2[Ag(NH_3)_2]^+_{(aq)} + 3OH^-_{(aq)} \to 2Ag_{(s)} + HCOO^-_{(aq)} + 2NH_{3(aq)} + 2H_2O_{(l)}$
$(c)$ $HCHO_{(l)} + 2Cu^{2+}_{(aq)} + 5OH^-_{(aq)} \to Cu_2O_{(s)} + HCOO^-_{(aq)} + 3H_2O_{(l)}$
$(d)$ $N_2H_{4(l)} + 2H_2O_{2(l)} \to N_{2(g)} + 4H_2O_{(l)}$
$(e)$ $Pb_{(s)} + PbO_{2(s)} + 2H_2SO_{4(aq)} \to 2PbSO_{4(s)} + 2H_2O_{(l)}$
(N/A)
| Reaction | Oxidised Species | Reduced Species | Oxidising Agent | Reducing Agent |
|---|---|---|---|---|
| $(a)$ | $C_6H_6O_{2(aq)}$ | $AgBr_{(s)}$ | $AgBr_{(s)}$ | $C_6H_6O_{2(aq)}$ |
| $(b)$ | $HCHO_{(l)}$ | $[Ag(NH_3)_2]^+_{(aq)}$ | $[Ag(NH_3)_2]^+_{(aq)}$ | $HCHO_{(l)}$ |
| $(c)$ | $HCHO_{(l)}$ | $Cu^{2+}_{(aq)}$ | $Cu^{2+}_{(aq)}$ | $HCHO_{(l)}$ |
| $(d)$ | $N_2H_{4(l)}$ | $H_2O_{2(l)}$ | $H_2O_{2(l)}$ | $N_2H_{4(l)}$ |
| $(e)$ | $Pb_{(s)}$ | $PbO_{2(s)}$ | $PbO_{2(s)}$ | $Pb_{(s)}$ |
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