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In the below equation - I - + I 2 → I 3 - Which is the lewis acid and why?

In the below equation -


I- + I2  → I3-


Which is the lewis acid and why?




Grade:11

1 Answers

Aman Bansal
592 Points
12 years ago

Dear Dushyant,

 

A Lewis acid is an electron pair acceptor. A Lewis base is an electron pair donor. This definition is more general than those we have seen to this point; anyArrhenius acid or base, or any Bronsted-Lowry acid or base can also be viewed as a Lewis acid or base. The reaction of H1+ with OH1-, for instance, involves donation and acceptance of a proton, so it is certainly legitimate to call it a Bronsted-Lowry acid-base reaction. But if we look at the Lewis structures for the reactants and products, we see that it is also legitimate to call this a Lewis acid-base reaction.
The hydroxide ion donates a pair of electrons for covalent bond formation, thus OH1- is a Lewis base in this reaction. The hydrogen ion accepts the pair of electrons so it is acting as a Lewis acid. Shown below is an example of a Lewis acid-base reaction that cannot be viewed as a Bronsted-Lowry acid-base reaction.

 

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