Chemistry: titration of an unknown amino acid

[superbnchic]

Homework Statement

A student titrated 10.00-mL aliquots of her unknown amino acid solution with standard 0.1521M NaOH (18.61mL) and with 0.0986M HCl (3.28mL). Calculate the concentration of the amino acid. Assume the amino acid contains both the A & A- forms of the amino acid.

Homework Equations

M1V1=M2V2

The Attempt at a Solution

I used the above equation but got different M1 for the amino acid concentration.

 

[Borek]

You wre already given a hint in the question - you start with a mixture of two forms of aminoacid. Think what reactions take place when you titrate with strong acid and with strong base.

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