pH of a solution mixing HCl and HIO3

[Shackleford]

Homework Statement

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCL with 450.0 mL of 0.400 M HIO3? HIO3 Ka = 1.6 x 10^-1

Homework Equations

ICE

The Attempt at a Solution

I first converted each concentration to its new molarity by figuring out the number of moles of each then dividing by the new volume of 0.5 L. I used the ICE method to determine the H+ concentration. I got a pH of 0.714.

 

[Borek]

0.714 looks OK

Although it should be more like 0.71, you are given only 2 significant digits of Ka.


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