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### Topic: Buffer question  (Read 3556 times)

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#### gidget

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##### Buffer question
« 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*

#### Borek

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##### Re: Buffer question
« Reply #1 on: March 27, 2009, 02:29:41 PM »
Do you know any equations describing buffer pH?
Chembuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info, PZWT_s1

#### gidget

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##### Re: Buffer question
« Reply #2 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

#### Borek

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##### Re: Buffer question
« Reply #3 on: March 27, 2009, 05:35:18 PM »
So you have to look it up. No other way of solving the question.
Chembuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info, PZWT_s1