Homework Help: chem - br bob is this right

Posted by phil on Wednesday, April 21, 2010 at 11:05pm.

What is the pH of a solution prepared by adding 4.000 grams of NaOH to a 50.00 mL of a buffer that is 2.00 molar both in acetic acid and sodium acetate? (Assume final volume is still 50.00 mL)

* chem - DrBob222, Wednesday, April 21, 2010 at 10:52pm

* chem - phil, Wednesday, April 21, 2010 at 10:59pm

i did .1 mols of AC- + .1 mols of OH gives me .2 mols of AC.

the .2 mols of AC reacts with water
AC- + H20---> OH- + HAC

so the M is .2/.05 L = 4M

to solve for the OH conc i did X^2 / 4 = 5.6 x 10^-10. and solving for the pH i get 9.675

is this right?

chem - br bob is this right - DrBob222, Wednesday, April 21, 2010 at 11:21pm
Yes, it's right. I answered below at the original post.

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