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Topic: Calculating fractions EDTA  (Read 6890 times)

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Offline Sammieswife

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Calculating fractions EDTA
« on: February 05, 2008, 10:11:40 PM »
Can anyone help me with calculating the fractions of EDTA species in water and drawing a plot of the species fractions? I need help ASAP!
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Offline Borek

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Re: Calculating fractions EDTA
« Reply #1 on: February 06, 2008, 03:04:14 AM »
See equations 9.11, 9.12 and 9.13 here:

http://www.chembuddy.com/?left=pH-calculation&right=pH-polyprotic-acid-base

They are correct for every acid. You will need to modify them as EDTA has four protons, not three, but it shouldn't be diffucult. Then it is just a matter of entering known values into the equation.
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