Question

mity Laboratory Manual, 2017 Revision Redox Reactions Pre-Lab Date: Name: 1) What distinguishes a redox reaction from a chem replacement? guishes a redox reaction from a chemical reaction such as a double 2) Consider the following unbalanced net ionic redox equation. vo* + S0,- → v3+ + SO42- (a) Name the oxidizing agent in this reaction. (b) Name the ion that is oxidized in this reaction. (c) Balance this net ionic redox equation in acidic solution.

Answer 1

(1) Redox reaction differs from double displacement, that in double displacement reaction only elements exchange between their cation and anon, there is no change in ondation state of elements but in redex neartion, elements change their oxidation state for eg: Agros + Nach Ägel & stano" Ag is th in reactant as well as in product . .. Na + in .. - - u is . - . i -1 This is a reaction not double displacement a redox reaction. egr no + c zu co zu es 42 in reactant and is o in product C is o reactant wi is and +2 in product. This is a redox reaction where element change their oxidation state. (2) Vo7 & s03²- v3+ + sou 2- let oxid state of vin vot is a Then, 2-421 X-5 let oxid state of S in sog2 say. Then, G-62.2 3 424 ) let oxidation state of sin soy?- is 2. Then, 2-82-2 7 2=6 oxidising agent, which oxidises other and +5 get reduced itself uts It is the oxidising agent. U+3

6 oxidation state increases Element or son whose gets oxidised stus to SO₃2- geto oxidised to so, 2- c) Vogt & sq 2- - vts to sou? vt & soy 2- + H₂O VO₂+ + sog? + $0247 Balanced egn ist vout & s0₃ 2- + 2H+ vt & son²"+401