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Volumetric Analysis 定性分析

Volumetric Analysis 定性分析. Topic IV Acids and Bases Topic XV Analytical Chemistry. Learning outcome. Manipulate titration apparatus pipette burette conical flask volumetric flask electrical balance Detection of end point Calculations. pipette. Washing tap water

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Volumetric Analysis 定性分析

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  1. Volumetric Analysis 定性分析 Topic IV Acids and Bases Topic XV Analytical Chemistry

  2. Learning outcome • Manipulate titration apparatus • pipette • burette • conical flask • volumetric flask • electrical balance • Detection of end point • Calculations

  3. pipette • Washing • tap water • deionised water • solution to be transferred • Transfer solution via pipette

  4. Burette • Washing • tap water • deionised water • solution to be filled in • Air bubbles • Control the burette • Reading : 0.02 cm³

  5. Conical flask / volumetric flask • Washing • tap water • deionised water

  6. Case I • Technique approach • Four experiments are arranged • HCl(aq) vs NaOH(aq) • Preparation of standard Na2CO3(aq) • Titration of Na2CO3(aq) vs HCl(aq) • Titration of CH3CO2H(aq) vs NaOH(aq)

  7. Experiment 1 • Titration : HCl(aq) vs NaOH(aq) • Pipette and pipette filler • Burette, conical flask • Burette reading 0.02 cm³ • End point of titration • methyl orange

  8. Experiment 2 • Preparation • standard Na2CO3(aq) solution • Weighing bottle, electrical balance • Dissolve the solid • Pour the solution into a volumetric flask • Graduation mark of volumetric flask

  9. Experiment 3 • Titration • Na2CO3(aq) vs HCl(aq) • pipette • burette • end point • methyl red

  10. Experiment 4 (a) • Assessment • Titration : CH3CO2H(aq) vs NaOH(aq) • (I) Dilution of a vinegar solution • pipette • volumetric flask

  11. Experiment 4 (b) • Assessment • (II) Titration : • dilute vinegar solution vs NaOH(aq) • Pipette • Burette, conical flask • Burette reading 0.02 cm³ • End point of titration • phenolphthalein • Calculations

  12. Case II • Concept approach • Three experiments are arranged • Preparation of Na2CO3(aq) • Titration of Na2CO3(aq) vs HCl(aq) • Titration of HCl(aq) vs NaOH(aq)

  13. Experiment 1 • Preparation • standard Na2CO3(aq) solution • Weighing bottle • Dissolving the solid • Pour the solution into a volumetric flask • Graduation mark of volumetric flask

  14. Experiment 2 • Titration • Na2CO3(aq) vs HCl(aq) • pipette and pipette filler • burette, conical flask • end point • methyl orange

  15. Experiment 3 (a) • Assessment • Titration : HCl(aq) vs NaOH(aq) • (I) Dilution of a NaOH(aq) solution • pipette • volumetric flask

  16. Experiment 3 (b) • Assessment • (II) Titration : • dilute NaOH(aq) vs HCl(aq) • Pipette • Burette, conical flask • Burette reading 0.02 cm³ • End point of titration • methyl red • Calculations

  17. Case III • Concept approach • Three experiments are arranged • Preparation of oxalic acid, HO2CCO2H(aq) • Titration of HO2CCO2H(aq) vs NaOH(aq) • Titration of HCl(aq) vs NaOH(aq)

  18. Experiments • Titration of oxalic acid vs NaOH(aq) • phenolphthalein • Titration of HCl(aq) vs NaOH(aq) • methyl orange

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