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Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: AussieKenDoll on April 14, 2019, 09:14:09 AM

Title: How to calculating the fractional composition of EDTA at a specific pH?
Post by: AussieKenDoll on April 14, 2019, 09:14:09 AM
See the attached pic, How does the equation change at different pHs?
Title: Re: How to calculating the fractional composition of EDTA at a specific pH?
Post by: Borek on April 14, 2019, 10:40:40 AM
Why don't you plug numbers and calculate by yourself?
Title: Re: How to calculating the fractional composition of EDTA at a specific pH?
Post by: AussieKenDoll on April 14, 2019, 11:03:25 AM
But I should know the [H+] to calculate fractional composition? But its not given?
And how does the fractional composition equation above for Y4- changes at different pHs?
Title: Re: How to calculating the fractional composition of EDTA at a specific pH?
Post by: Borek on April 14, 2019, 01:53:38 PM
But I should know the [H+] to calculate fractional composition? But its not given?

You are asked "How does it change with pH" - so you need to plug different pH values and check what is happening. Making a plot in a spreadsheet will be quite fast.