第三章-滴定分析法概论ppt课件

1、泛泛如用如用Na2CO3标定标定HCl：2HCl+Na2CO3 = 2NaCl+H2O+CO2指示剂：指示剂：MO质，故直接法是滴定分析中最常用和质，故直接法是滴定分析中最常用和最基本的滴定方法。最基本的滴定方法。l反应按化学计量关系定量进行，无副反反应按化学计量关系定量进行，无副反应应注意注意指明指明基本基本单元单元100010.00VTFe722722OCrKOCrK的含量被测测溶液11.17(g/L)100010.0020.000.005585 1molK2Cr2O7 2molFe3O4722722722722722722OCrKOCrKOCrKOCrKOCrKOCrKMTMVmVnCo

2、l/mL)0.01850(mml/L)0.01850(mo294.25.442/mL)0.008569(g1000231.620.01850OCrKOTFe722/43TBntbn BTnbtn )1()1(TbnBtnTBbntn TBntbn 可得：注：多个反应式时确定计量关系O8HMn2CO1016H2MnOOC5222424252OCMnO2424:)(: )(nn)MnO51()MnO(544 nn)OC21()MnO51(2424 nn)OC21()MnO51(2424 nn)()(242242OC21OC2nnNaOHSiO32223226226232414molNaOH4mol

3、HFSiO1molH1molSiOOHNaFNaOHHF2KFSiOH4HFO3HSiFKO3HSiFK4H2K6FSiOH2nnBBBBBBVMmVncTBBBBTTTntbnVcnVcnBTTBTTBBVVctbcVctbVcMB：B的摩尔质量，的摩尔质量，gmol-1mB：B的质量，的质量，gnB：B的物质的量，的物质的量，molVB：溶液的体积，：溶液的体积，LcB：溶液的浓度，：溶液的浓度，molL-1t T + b B = c C + d DsBTTBsBBTTBBBTTBBBmMVctbwmmwMmtbVcMVctbMnm质量分数：13102000. 0100 .2502 .29

4、4471. 12 .294722722LmolCmolgMOCrKOCrK已知：gMVcmmolgMCONaCONaCONaCONaCONa300. 50 .106100 .5001000. 00 .106313232323232已知：注意学会一步列式计算mLVV5 .171000. 00 .500)1000. 01035. 0(1000. 0)0 .500(0 .5001035. 0131010103327421165. 01020.2136.3814710. 02222452274227422742LmolVMmcnnNaClBOHOHHClOBNaHClOHOBNaOHOBNaHClOH

5、OBNaHCl32272226OFeOCrFennn3370. 05000. 07 .1591045.2301500. 03621212357. 05000. 085.551045.2301500. 066633327223223232327227227222sOFeOCrKsOFeFesOFeOFeOFesFeOCrKOCrKsFeOCrKsFeFeFemMnmMnmMnwmMVcmMnmMnw1140. 02000. 00 .10210)36.1105012. 000.2005082. 0(21332OAlw3232OAlEDTAAlnnnEDTAZnnn243322722326OFeOFeOCrFennnn13/13/13/009260. 05 .23110102000. 02136009582. 07 03126006702. 085.5510102000. 061643722722722433272272272