Consider the reactions-a H 3 P O 2 aq -4 AgNO 3 aq -2 H 2 O l - H 3 P O 4 aq -4 Ag s -4 HNO 3 aq b H 3 P O 2 aq -2 CuSO 4 aq -2 H 2 O l - H 3 PO 4 aq -2 Cu s - H 2 SO 4 aq c C 6 H 5 CHO l -2-Ag N H 3 2- aq -3 OH - aq - C 6 H 5 COO - aq -2 Ag s -4 NH 3 aq -2 H 2 O l d C 6 H 5 CHO l -2 Cu 2- aq -5 OH - aq - No change observed-What inference do you draw about the behaviour of Ag -and Cu 2- from these reactions-

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Oxidising Reagent and Reducing Reagent

Consider the ...

Question

Consider the reactions:
(a) $H_{3} P O_{2} (a q) + 4 A g N O_{3} (a q) + 2 H_{2} O (l) \to H_{3} P O_{4} (a q) + 4 A g (s) + 4 H N O_{3} (a q)$
(b) $H_{3} P O_{2} (a q) + 2 C u S O_{4} (a q) + 2 H_{2} O (l) \to H_{3} P O_{4} (a q) + 2 C u (s) + H_{2} S O_{4} (a q)$
(c) $C_{6} H_{5} C H O (l) + 2 [A g (N H_{3}) 2]^{+} (a q) + 3 O H^{-} (a q) \to C_{6} H_{5} C O O^{-} (a q) + 2 A g (s) + 4 N H_{3} (a q) + 2 H_{2} O (l)$
(d) $C_{6} H_{5} C H O (l) + 2 C u^{2 +} (a q) + 5 O H^{-} (a q) \to$ No change observed.
What inference do you draw about the behaviour of $A g^{+} a n d C u^{2 +}$ from these reactions?

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A g^{+}

C u^{2 +}

H_{3} P O_{2} (a q) + 4 A g N O_{3} (a q) + 2 H_{2} O (l) \to H_{3} P O (a q) + 4 A g (s) + 4 H N O_{3} (a q)

H_{3} P O_{2} (a q) + 2 C u S O_{4} (a q) + 2 H_{2} O (l) \to H_{3} P O_{4} (a q) + 2 C u (s) + H_{2} S O_{4} (a q)

C_{6} H_{5} C H O (l) + 2 [A g (N H_{3})_{2}]^{+} (a q) + 3 O H^{-} (a q) \to C_{6} H_{5} C O O^{-} (a q)

+ 2 A g (s) + 4 N H_{3} (a q) + 2 H_{2} O (l)

C_{6} H_{5} C H O (l) + 2 C u^{2 +} (a q) + 5 O H^{-} (a q) \to

Identify the substance oxidised, reduced, oxidising agent and reducing agent for each of the following reactions:

(a) 2AgBr (s) + C₆H₆O₂(aq) → 2Ag(s) + 2HBr (aq) + C₆H₄O₂(aq)

(b) HCHO(l) + 2[Ag (NH₃)₂]⁺(aq) + 3OH^–(aq) → 2Ag(s) + HCOO^–(aq) + 4NH₃(aq) + 2H₂O(l)

(d) N₂H₄(l) + 2H₂O₂(l) → N₂(g) + 4H₂O(l)

(e) Pb(s) + PbO₂(s) + 2H₂SO₄(aq) → 2PbSO₄(s) + 2H₂O(l)

{H C H O}_{(l)} + 2 [A g (N H_{3})_{2}]_{(a q)}^{+} + 3 O H_{(a q)}^{-} \to 2 A g_{(s)} + H C O O_{(a q)}^{-} + 4 {N H_{3}}_{(a q)} + 2 {H_{2} O}_{(l)}

C u (s) | C u^{2 +} (a q) | | A g^{+} (a q) | A g (s)

C u (s) | C u^{2 +} (a q) | | A g^{+} (a q) | A g (s)

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