Molar Mass of an Unknown Acid

Today my lab partner and I finished our Molar Mass of an Unknown Acid lab. This lab was another titration, however, it was different from the last one in that we didn't know what the acid was in the second titration. Using KHP to standardize, we were able to calculate the molar mass of the unknown acid. After performing the titrations of the KHP and the unknown acid, we then calculated the molar mass of KHP. Once the average molarity was found, we were able to convert it to moles of the unknown acid using the volume of NaOH used, the average molarity of KHP, and the mole to mole ratio. With the moles of the unknown acid we were able to use it as the divider of the mass of the unknown. In dividing the mass by the moles, we were able to calculate the molar mass as 164.76 g/mol.

The unknown acid at its equivalence point

This link helped with the calculations for this lab