• University of Waterloo

• CHEM 120L

Experiment 2:Identification of an Unknown Solid Acid Post-lab Report Sheets

Experimental objectives:

 To learn about the techniques of weighing by difference, quantitative transfer and

standardization titrations

 To make a primary standard solution, use this solution to determine the concentration of a

sodium hydroxide standard

 To use an NaOH standard to titrate against an unknown solid acid in order to determine

the molar mass and thus identity of the unknown from the set of possible unknowns

 To develop skill in the use of unit analysis for calculations

Results Part A:

Mass of oxalic acid used: 1.2886g

Calculation for determining the concentration of the oxalic acid solution, using unit analysis:

Concentration of oxalic acid

solution: 0.10221 M

Show a sample calculation for determining the concentration of NaOH using unit analysis: