of bromine. Why ? . Identify the substance oxidised reduced, oxidising agent and reducing agent for each of the following reactions: (a) 2AgBr (s) + C H O (aq) → 2Ag(s) + 2HBr (aq) + C H O (aq) (b) HCHO(l) + [Ag (NH ) ] + (aq) + 3OH – (aq) → 2Ag(s) + HCOO – (aq) + 4NH (aq) + 2H2O(l) (c) HCHO (l) + Cu + (aq) + OH – (aq) → Cu2O(s) + HCOO – (aq) + 3H O(l) (d) N H (l) + 2H O (l) → N (g) + 4H O(l) (e) Pb(s) + PbO (s) + 2H SO (aq) → 2PbSO (s) + 2H O(l) .
Consider the reactions : S O – (aq) + I (s) → S O – (aq) + 2I – (aq) S O – (aq) + 2Br (l) + H O(l) → 2SO – (aq) + 4Br – (aq) + 10H + (aq) Why does the same reductant, thiosulphate react differently with iodine and bromine ? . Justify giving reactions that among halogens, fluorine is the best oxidant and among hydrohalic compounds, hydroiodic acid is the best reductant. .
Why does the following reaction occur ? XeO – (aq) + 2F – (aq) + 6H + (aq) → XeO (g)+ F (g) + 3H O(l) What conclusion about the compound Na XeO (of which XeO – is a part) can be drawn from the reaction. . Consider the reactions: (a) H PO (aq) + AgNO (aq) + H O(l) → H PO (aq) + 4Ag(s) + 4HNO (aq) (b) H PO (aq) + 2CuSO (aq) + H O(l) → H PO (aq) + 2Cu(s) + H SO (aq) (c) C H CHO(l) + [Ag (NH