1. Equipment:  50 mL buret; 2, 5, and 0 mL volumetric pipettes; 10 mL Mohr pipette; 250 ml Erlenmeyer flask; rinse bottle with distilled water.

2. Solutions:  50 ml of dilute acetic acid (CH3COOH) solution (“vinegar”), concentration not specified (typically around 50 mg/mL); 250 mL of NaOH solution of known concentration.  The concentration, in moles per liter, will be given at the event.

3. Rules:

a. Only the equipment and solutions listed above may be used.
b. Any number of titrations may be run.  However, no additional base of vinegar will be supplied.
c. All data and results must be submitted to the moderator no more than thirty (30) minutes from the beginning of the event.
d. Calculations must be shown on the data sheet provided for the event.  A copy of the data sheet appears at the end of the guidelines.
e. Simple calculators may be used; however graphing calculators or programmable calculators are not allowed.

a. Teams may divide the labor as they choose, however, no more than  two members should be at the buret at any time
b. Vinegar concentration must be reported in mg/mL, and reported to four significant.
c. The average of at least two determinations, using 25 mL of base each, must be submitted for scoring.
d. Teams are encouraged to perform a trial run in order to estimate the amount of base and vinegar needed, and to practice recognizing the end point.
e.  Except for the trial results. All other data should be reported.  The report should give reasons for rejecting any data that are not included in the final average.
f. The team score will be determined using the following formula.