Conclusion PDF

Preview

Summary

A conclusion for the experiment 3 Quantification of copper in solution ...

Description

Conclusion:

For Part A, oxalic acid dihydrate was used to find the concentration of NaOH. The mass of oxalic acid dihydrate had a concentration of 0.093mol/L, since NaOH is diprotic the concentration was multiplied by two in order to find the moles of NaOH. Three titrations were performed, using these three separate titrations to find an average concentration for NaOH, it is found that the concentration of the sodium hydroxide was 0.100M. For Part B, the prepared and standardized solution of NaOH, with a known molarity of 0.100M is used to determine the molar mass of an unknown acid solution by titrating these two solutions together. Because the nature of the acid’s proton donation is unknown, the experimental results the calculations for a monoprotic acid: 64.1g/mol, a diprotic acid: 128.0 g/mol, and a triprotic acid: 193.6 g/mol. Random error was present in this lab due to the impossibility of making a perfect measurement; this was prevalent to the titration process, which includes measurement of the volume used out of the burette. Systematic error was also present in the titration process due to subjective analysis of the titration process, especially the identification of the end point as opposed to the equivalence point. The NaOH solution was calculated to be 0.100M and the possible molar masses based on if the acid was diprotic it would be oxalic acid, since it is diprotic and has a molar mass od 126.7g/mol , which is very close to the molar mass of the diprotic acid, 128.0g/mol....