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Which of the following will have the highest percent ionization? PLEASE EXPLAIN! THANK YOU SO MUCH!...

Which of the following will have the highest percent ionization? PLEASE EXPLAIN! THANK YOU SO MUCH!

A. HNO2

B. HCO2H

C. H2CO3

D. HBrO3

E. HIO

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Answer #1

Answer: D. HBrO3

The stronger the acid, it dissociates completely which means larger the ionization percentage. Here among all the acids HBrO3 is the stronger acid in which Br is present in +5 oxidation state.

In other way, one can also compare the Ka (acid dissociation constant) vales to find the acid which will dissociate in larger percentage.

HNO2   4.0 x 10-4

HCO2H   1.8 x 10-4

H2CO3   4.5 x 10-7

HBrO3   > 1

HIO    2.0 x 10-11

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