工业混合碱各组分含量测定——一种综合型实验方案设计

王园朝, 程和勇

Design of a Comprehensive Experiment for Determination of Each Component in Industrial Mixed Alkali

Yuanchao Wang, Heyong Cheng

表3 测定结果相关数据列表

混合碱I (Na2CO3 + NaOH) 混合碱II (Na2CO3 + NaHCO3) 取混合样品体积V/mL 25.00 25.00 方法一 酚酞为指示剂消耗HCl平均体积V/mL V1 = 14.45 V3 = 4.96 甲基橙为指示剂消耗HCl平均体积V/mL V2 = 4.95 V4 = 14.85 组分平均质量浓度$ \overline \rho $/(g∙L−1) $ {\overline \rho _{{\text{NaOH}}}} = 1.520 $ $ {\overline \rho _{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}}} = 2.099 $ $ {\overline \rho _{{\text{NaHC}}{{\text{O}}_{\text{3}}}}} = 3.323 $ $ {\overline \rho _{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}}} = 2.103 $ 方法二 酚酞为指示剂消耗HCl平均体积V/mL V5 = 14.47 V7 = 4.95 甲基橙为指示剂消耗HCl平均体积V/mL V6 = 19. 40 V8 = 19.69 组分平均质量浓度$ \overline \rho $/(g∙L−1) $ {\overline \rho _{{\text{NaOH}}}} = 1.526 $ $ {\overline \rho _{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}}} = 2.090 $ $ {\overline \rho _{{\text{NaHC}}{{\text{O}}_{\text{3}}}}} = 3.289 $ $ {\overline \rho _{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}}} = 2.099 $ 方法三 酚酞为指示剂消耗HCl平均体积V/mL V9 = 9.23 – 甲基橙为指示剂消耗HCl平均体积V/mL V10 = 19.48 – 组分平均质量浓度$ \overline \rho $/(g∙L−1) $ {\overline \rho _{{\text{NaOH}}}} = 1.477 $ $ {\overline \rho _{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}}} = 2.173 $ – 方法四 第一突跃点消耗HCl平均体积V/mL V11 = 14.38 V13 = 4.98 第二突跃点消耗HCl平均体积V/mL V12 = 19.41 V14 = 19.93 组分平均质量浓度$ \overline \rho $/(g∙L−1) $ {\overline \rho _{{\text{NaOH}}}} = 1.496 $ $ {\overline \rho _{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}}} = 2.133 $ $ {\overline \rho _{{\text{NaHC}}{{\text{O}}_{\text{3}}}}} = 3.306 $ $ {\overline \rho _{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}}} = 2.112 $