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Q1. Latimer diagram and Frost diagram : a) Find Latimer diagram for chlorine in acid solution...

Q1. Latimer diagram and Frost diagram :

a) Find Latimer diagram for chlorine in acid solution in the text book. Calculate the Eø in going for the ClO3-/HClO couple in acidic solution.

b) Find a Frost diagram for Cl2 in acid and basic solution. What are the consequences of dissolving (a) Cl2 in aqueous basic solution and (b) aqueous acidic solution?

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Answer #1

For Chlorine

E(ClO4-/ClO-) acidic medium = (2 x 1.2 + 2 x 1.18 + 2 x 1.60 /6 = 1.326 V

If the points of Cl- and ClO4- are joinedby a straight line, Cl2 lies above it. hence Cl2 is thermodynamically more prone to disproportionate into Cl- and ClO4- when it is dissolved in aqueous base. In actual practice , the oxidation of ClO- is slow, so a solution of Cl- and ClO- is formed when dissolved in aqueous basic solution.

look at the Frost diagram for chlorine in acidic solution. If the points of Cl- and any of the positive oxidation state of Cl are joined together by a straight line, the point for Cl2 lies below it(if only slightly). Therefore, Cl2 will not disproportionate.

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