Find pH of solution

[Shackleford]

1. The problem statement, all variables and given/known data

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

2. Relevant equations

ICE

3. 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 :smile:

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

Borek
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pH calculator (http://www.chembuddy.com/?left=BATE&right=pH-calculator) & buffer calculator (http://www.chembuddy.com/?left=Buffer-Maker&right=buffer-calculator)