In conclusion, the purpose of this experiment was to determine the concentration of a sodium hydroxide solution by titrating it with a standard solution of known concentration. After the experiment we determined that the average concentration of NaOH was 0.0972M, when in theory it should have been 0.1M. This meant that there were some errors that had to be taken into consideration after the experiment.

 Percent Error:  (0.1-0.0972)/ 0.1) *100=37.7

                         2.8% percent error

Some possible sources of error that may have occurred include, the NaOH being exposed to the air for too long. The exposure may have caused the NaOH to react with the CO2 in the air, thus changing the overall mass. Another source of error may have been that we could not obtain the exact amount of NaOH and KHP because the balance kept fluctuating, so we had to estimate. This may also have caused some sort of error when we calculated the concentration. The final source of error may have been that the solution of NaOH and KHP may not have reacted completely because they were not mixed well.