Homework Help: Chemistry Acid Question Ka

Posted by RZeal on Sunday, April 22, 2012 at 10:52pm.

Enough of a monoprotic acid is dissolved in water to produce a 0.0165 M solution. The pH of the resulting solution is 2.38. Calculate the Ka for the acid.

Chemistry Acid Question Ka - RZeal, Sunday, April 22, 2012 at 10:59pm
Nevermind I figured it out,
With the equation
Ka = x^2 / 0.0165 - x

x = [H+]
I forgot to do the 0.0165-x in my original calculation, but after doing that I got the correct answer.
Chemistry Acid Question Ka - DrBob222, Sunday, April 22, 2012 at 11:07pm
That's right. 0.0165-x can't be assumed = 0.0165

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