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Molarity of citrate phosphate buffer

Started by proteinz, Nov 02 2010 07:38 AM

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#1 proteinz

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Posted 02 November 2010 - 07:38 AM

Hi Guys,What molarity is my pH6.5 citrate phosphate solution if i add 0.4 M sodium phosphate and 0.2M citric acid?
thanks in advance!

#2 phage434

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Posted 04 November 2010 - 02:23 AM

0.4 M sodium (or 2x to 3x higher, depending on which sodium phosphate is used.  Since the pH is determined by this, you can back calculate the amount of sodium, knowing the pH.  Is this homework?)
0.4 M phosphate
0.2 M citrate
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