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#SA15.5 Which acid has the largest Ka. HIO2(aq) HClO2(aq) HBrO2(aq) All three acids have the same...

#SA15.5

Which acid has the largest Ka.

HIO2(aq)
HClO2(aq)
HBrO2(aq)
All three acids have the same Ka.
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Homework Answers

Answer #1

the large rvalue of Ka means that it is more acidic in nature and easily releases proton.

As oxygen is more electronegative than the halogens , it attracts the electron of oxygen halogen bond towards itself .

As the electronnegativity decreases from Cl to I the shared pair of electron of oxygen_halogen bond moves closer and closer to the oxygen atom .

consequently electron density on oxygen increases from Cl to I and we can say that
the proton release in HClO2 is easily take place while in HIO2 it does not.

so the HClO2 is having largest Ka value .

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