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  4. variation of pk values in COO- and NH3+
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variation of pk values in COO- and NH3+

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misstear31

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variation of pk values in COO- and NH3+
« on: 24/03/2010 13:42:16 »
Hi,
I have a mid term exam tomorrow, and I can't answer a question from a previous exam...
Here is the question with formulas :


Text : The four compounds A, B, C and D all have carboxyl group and three of them have an amino group.
You measure the pK values for these 7 group and obtain  the values : 2, 3, 4, 5, 8, 9 and 10.
Which values correspond to which group in A, B, C and D ?

I have looking for an explanation everywhere, you are my last chance.
Thanks a lot for your answers...
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