南阳理工学院学报
南暘理工學院學報
남양리공학원학보
JOURNAL OF NANYANG INSTITUTE OF TECHNOLOGY
2011年
2期
104-108
,共5页
氧化还原滴定%计算机模拟%弦割法%滴定突跃%滴定曲线%终点误差
氧化還原滴定%計算機模擬%絃割法%滴定突躍%滴定麯線%終點誤差
양화환원적정%계산궤모의%현할법%적정돌약%적정곡선%종점오차
redox titration%computer simulation%chord secant method%titration jump%titration curve%end point error
根据电化学平衡原理对氧化还原滴定的过程进行了讨论，建立了溶液的电极电势值与滴定分数的数学模型，并推导了氧化还原滴定终点误差的计算公式。利用Visual Basic强大的绘图和计算功能，设计了一个程序用以求解氧化还原滴定的化学计量点、突越范围，绘出滴定曲线，该程序也可根据提供的指示剂的变色点计算出滴定误差。最后用某一实例对计算程序进行了验证，运算结果和参考数据吻合良好。程序可用于指导氧化还原滴定指示剂的选择以便提高分析的精确度。
根據電化學平衡原理對氧化還原滴定的過程進行瞭討論，建立瞭溶液的電極電勢值與滴定分數的數學模型，併推導瞭氧化還原滴定終點誤差的計算公式。利用Visual Basic彊大的繪圖和計算功能，設計瞭一箇程序用以求解氧化還原滴定的化學計量點、突越範圍，繪齣滴定麯線，該程序也可根據提供的指示劑的變色點計算齣滴定誤差。最後用某一實例對計算程序進行瞭驗證，運算結果和參攷數據吻閤良好。程序可用于指導氧化還原滴定指示劑的選擇以便提高分析的精確度。
근거전화학평형원리대양화환원적정적과정진행료토론，건립료용액적전겁전세치여적정분수적수학모형，병추도료양화환원적정종점오차적계산공식。이용Visual Basic강대적회도화계산공능，설계료일개정서용이구해양화환원적정적화학계량점、돌월범위，회출적정곡선，해정서야가근거제공적지시제적변색점계산출적정오차。최후용모일실례대계산정서진행료험증，운산결과화삼고수거문합량호。정서가용우지도양화환원적정지시제적선택이편제고분석적정학도。
A mathematical model on the potential electrode value of the solution vs. the titration percentage was established by the theory of the chemical equilibrium, therefore; the calculating formula of the end point error in the redox titration was deduced. By the strong function of the Visual Basic language in the calculation and plotting, a program was designed to calculate the stoichiometric point and the jump range of the titration, moreover; the program can draw the titration curve and calculate the end point error of the titration according to the color-shift point. Finally; the example was taken to verify the program and it shows the calculation results agree well with the documents data. The program can conduce to choose the appropriate indicator so that the accuracy of the analysis can be improved.
