Chemistry Practice Problems Identifying Acids and Bases Practice Problems Solution: Which acid has the larger acid-dissociation consta...

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Solution: Which acid has the larger acid-dissociation constant, HIO2 or HBrO3?

Problem

Which acid has the larger acid-dissociation constant, HIO2 or HBrO3?

Solution

We're being asked to determine which of HIO2 and HBrO3 has a larger acid-dissociation constant


An acid dissociation constant (Ka) is a quantitative measure of the strength of an acid in solution. So the greater the strength of the acid, the larger the acid dissociation constant.


HIO2 and HBrO3 both have H+ ion connected to a nonmetal and oxygen, so they are oxyacids.


Recall that oxyacids can be identified by the fact that they all possess an H+ ion connected to a nonmetal and oxygen, hence the prefix “oxy”.


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