分析化学第二次作业答案2014

MaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide1of87AnalyticalchemistryExercisesandsolutionsMaQuanhongMaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide2of87Exercise•QuantitativeChemistryAnalysis：–P48：2.5%07.0%1000.3002.0)4(%1.0%1000.2002.0)3(%2.0%1000.1002.0)2(%4.0%1000.502.0)1(rrrrEREEREEREEREMaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide3of87Exercise•QuantitativeChemistryAnalysis：P48：2.754.20624.123nxxi12.048.2060.20minmaxxxrange54.20255.2053.20medianMaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide4of87Exercise•QuantitativeChemistryAnalysis：P48：2.7A%22.0%10054.20046.0%100xsCV046.016101061)(42nxxsi05.054.206046.0571.254.20ntsxMaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide5of87Exercise•QuantitativeChemistryAnalysis：P49：2.10(1)n=4,QTab,0.95=0.85∴Qc=0.60QTab,0.95=0.85∴41.27shouldberetained60.027.4184.4127.4161.41112xxxxQncSlide5of87MaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide6of87Exercise•QuantitativeChemistryAnalysis：P49：2.10(2)n=4,QTab,0.95=0.85∴Qc=0.89QTab,0.95=0.85∴7.388shouldberejected.89.0284.7388.7295.7388.711xxxxQnnncSlide6of87MaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide7of87Exercise•QuantitativeChemistryAnalysis：P49：2.12size.sampletheIncreasedigitstsignifican3%477.0%1002000.0271053.3%100%1053.31002012.012.231002002.000.2555332SAlZnEDTAAlmmAlmolnnnSlide7of87MaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide8of87Exercise•分析化学（华东理工）•P27思考题6:•∵取样3.5g，故最终实验结果的有效数字为2位•∴甲的报告是合理的•P27习题1:∵称量时需称2次∴称量误差：±0.2mggWRE2.0W%1.0%1002.0MaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide9of87Exercise•分析化学（华东理工）P28习题6(Grubbs的置信度为95%，书上没有置信度90%的数据)•∴8.69%shouldberetainedat95%and99%confidencelevel,respectively.%47.86)%38.869.852.845.832.844.8(x%129.0%16108281)(42nxxsi)94.1(),82.1(71.1%129.0)%47.869.8(99.095.0GGsxxGncMaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide10of87Exercise∴8.69%shouldberetainedat90%and99%confidencelevel,respectively.∵n=6t0.90=2.015∴∵n=6t0.99=4.032∴)74.0(),56.0(46.0)%32.869.8()%52.869.8(99.090.011QQxxxxQnnnc)%11.047.8(6%129.0015.2%47.8ntsx)%21.047.8(6%129.0032.4%47.8ntsxMaQuanhongAnalyticalchemistry:ExercisesandsolutionSlide11of87Exercise•分析化学（华东理工）P28习题10:•(1)三位；(2)四位；(3)二位；(4)二位•P28习题11:5688455107.1103.3101.6105.1)4(2.7056.136005164.062.50827.9)3(36.62)09460.0709.8/(38.51)2(868.11065.2106.9868.100814.00326.0106.9854.0187.2)1(