1. The problem statement, all variables and given/known data 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. 2. Relevant equations M1V1=M2V2 3. The attempt at a solution I used the above equation but got different M1 for the amino acid concentration.