Chem lab # 5

Standardization of sodium hydroxide solution Data Mass of KHP .350g .335g .315g Initial Buret reading 0ml 0ml 0ml Final Buret reading 17ml 26ml 18ml Volume of NaOH solution used 17mol 26mol 18ml Molarity of NaOH 1.01E-4M 9.65E-4 9.07E-5 Average Molarity of NaOH: 2.880E-4M Uncertainty of NaOH : .00300M Molecular mass of an unknown monoprotic acid: sample #902 Data Mass of unknown acid .262g .232g .296g Initial Buret reading 0ml 0ml 0ml Final Buret reading 19ml 20.2ml 21.67ml Volume of NaOH solution used 19mol 20.2mol 21.67ml Results Moles of NaOH used .0059mol .0075mol .0052mol Moles of acid reacted .0059mol .0075mol .0052mol Molecular mass of acid 44.41g/mol 30.93g/mol 21.67ml Average Molecular mass of acid: 44.087g/mol Uncertainty molecular mass acid :.00390g/mol Trail 3 Trail 2 Trail 1 Trail 3 Trail 2 Trail 1 Trail 3 Trail 2 Trail 1