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April 24, 2015

Homework Help: Chemistry

Posted by Trixie on Tuesday, March 16, 2010 at 11:52pm.

A buffer solution of volume 100.0 mL is 0.150 M Na2HPO4(aq) and 0.100 M KH2PO4(aq). Refer to table 1.
(a) What are the pH and the pH change resulting from the addition of 80.0 mL of 0.0500 M NaOH(aq) to the buffer solution?
pH

pH change (include negative sign if appropriate)


(b) What are the pH and the pH change resulting from the addition of 10.0 mL of 1.0 M HNO3(aq) to the initial buffer solution?
pH

pH change (include negative sign if appropriate)

So I found the pH of the initial buffer solution to be 7.38 (using pka2=7.21). I am not sure how to set up this problem to add the NaOH to the buffer solution

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