Unknown Acid Problem - 1

You have inherited an old chemistry laboratory at your new company, and the first order of business is to take inventory of the chemicals in the stockroom so that you can properly dispose of old chemicals according to current EPA regulations. Unfortunately, the previous chemist was lazy, and some of the bottles are not labeled thoroughly. Of particular concern are two bottles marked simply "acid" with no further information. Fortunately you find an old lab notebook with the following notations: "... available acids: crotonic (pKa=4.69), methylmalonic (pKa=3.07), diphenylacetic (pKa=3.94), picric (strong), alloxanic (pKa=6.64), methyl-m-aminobenzoic (pKa=5.10)...".

You decide that you can collect some experimental data which will enable you to both (1) identify the unknown acids by comparison with the lab notebook information, and (2) determine their concentrations. Since the disposal of unidentified chemicals is more expensive than that of known compounds, a few hours of lab work can translate into considerable savings for your company.

Use the Virtual Lab to identify the contents and concentration of the first bottle. Summarize your findings in the spaces provided bellow the Virtual Lab interface. The error for both values must be under 5%.

You can submit your answers up to three times. If all three answers are incorrect then you will be given a new problem and you can keep going. Enjoy your work!
Please be aware that reloading the page will result in having to start a new problem.

Write a report of your experiment(s) as a separate document. Be sure and include a complete record of your actions in the written report. A sample report can be found here.