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Topic: How do i calcualate the concentrations of phosphate at all four states  (Read 2391 times)

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Offline idamarie

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How do i calcualate the concentrations of phosphate at all four states
« on: January 21, 2014, 07:36:01 PM »
How do i calculate phosphate concentrations of the four different states assuming physiological conditions.
pH 7.4
H3PO4    pKa=2.12
H2PO4    pKa=7.21
HPO4     pKa=12.67
PO4       pKa= 
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Offline AWK

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Re: How do i calcualate the concentrations of phosphate at all four states
« Reply #1 on: January 22, 2014, 02:12:13 AM »
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Offline Borek

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Re: How do i calcualate the concentrations of phosphate at all four states
« Reply #2 on: January 22, 2014, 03:08:00 AM »
http://www.chembuddy.com/?left=pH-calculation&right=pH-polyprotic-acid-base

See equations 9.11-9.13. They are for a diprotic acid, but it is quite easy to generalize for any acid.
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