Analysis/Conclusion:

The purpose of this lab was to use conductivity to determine stoichiometric coefficients in a chemical reaction. In this lab, the ratio between the stoichiometric coefficients of the two reactants, silver ion and unknown, were determined. The conductivity of each test tube was determined, and then compared in order to identify the solution with the lowest conductivity. Upon completion of this experiment, Test Tube 7 was found to have the lowest conductivity with a 7:3 volume ratio of silver to unknown. Test tube 7 had a stoichiometric ratio of 2:1 when comparing the amounts of silver and unknown. The lowest conductivity (Test Tube 7), was thus found to be 874 µS. Based upon this information, the balanced equation between Ag+ and Bn- is: 

2 Ag (aq)+ B2- (aq) → Ag2B (s). The value of n is therefore 2, based upon the 2:1 ratio in test tube 7.

Although the results of this lab were accurate, as in any lab, the possibility for error was still present. For example, when rinsing the conductivity sensor with deionized water, it was crucial that the sensor was properly cleaned. If any solution was left on the sensor between cleanings, the conductivity would be incorrect. There may have also been errors when reading the data collection system. If the numbers were not allowed to stop fluctuating, then the data collected would be incorrect, and would in turn falsify the results of the lab. In future experiments, I would increase the number of trials for this lab, in order to achieve more plentiful and accurate data. I would also make sure to emphasize thorough cleaning of the conductivity sensor between tests, in order to avoid simple cross-contamination errors.