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Topic: how do you create a buffer system?  (Read 7461 times)

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JennLyn6

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how do you create a buffer system?
« on: March 21, 2004, 05:22:45 PM »
how would you go about to create a buffer system?

Edit: edited title for better indexing. Mitch
« Last Edit: April 24, 2004, 07:06:11 PM by Mitch »

Offline Mitch

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Re:one more please
« Reply #1 on: March 21, 2004, 07:30:46 PM »
Do you want an equation or just a rough description?
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Offline Donaldson Tan

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Re:one more please
« Reply #2 on: March 21, 2004, 11:31:12 PM »
a buffer can be created by mixing a weak acid with a strong base, or a strong acid with a weak base. The later is not favoured, cuz typically the working range of most pH indicators will not fall into the buffer system's range  ;)
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JennLyn6

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Re:one more please
« Reply #3 on: March 22, 2004, 08:14:58 AM »
thank you for your reply, i would like a description please

GCT

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Re:one more please
« Reply #4 on: March 22, 2004, 07:55:04 PM »
First you need to know the pH of the system you wish to create.  Find a conjugate base/acid which (dually weak) with a suitable pKa, you should easily be able to find a list of these in a standard chem book.  Use the henderson hasselbach equation (look it up if you do not know what I am talking about) to find the relative concentration of buffer acid and base.  

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