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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: gidget on March 27, 2009, 12:44:39 PM

Title: Buffer question
Post by: gidget on March 27, 2009, 12:44:39 PM

Our professor gave us some questions to look at about buffers in preparation for a quiz and I'm stuck on how to solve this:

What is the pH of the buffer formed by adding 100mL of 0.150M KHP to
a) 100mL of 0.0800M NaOH
b) 100mL of 0.0800M HCl

Thanks in advance for you *delete me*

Title: Re: Buffer question
Post by: Borek on March 27, 2009, 02:29:41 PM

Do you know any equations describing buffer pH?

Title: Re: Buffer question
Post by: gidget on March 27, 2009, 02:37:08 PM

the only thing i can think of to do is to use pH=pKa + log [A]/[HA] but we arent given the ka

Title: Re: Buffer question
Post by: Borek on March 27, 2009, 05:35:18 PM

So you have to look it up. No other way of solving the question.