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.
The Attempt at a Solution
I used the above equation but got different M1 for the amino acid concentration.