1. eTitrator The Online Titration Calculator Kevin Ngo Department of Chemistry Central Washington University SOURCE, May 2014

2.  Concepts  Chemical Equilibrium  General Chemistry  Acid Base Titration  Confusing and Difficult Calculations Introduction

3. Currently ImplementedFuture Interface Simple Input Advanced Input Graphical Visualization of Titration General Chemistry pH Calculation Strong Titrant Strong and Weak Analytes Monoprotic and Polyprotic Acids Interface Cell phones and Tablets Step by Step Tutorial Problem Generator Features

4.  Software  Up-to-date Web Browsers  Operating System  Windows  Mac  Linux/UNIX  iOS/Android Platform Requirements

5. Application Programming Interface Titration System Acid-Base HTML Titration Wrapper ComplexometricRedox Real Life Equivalence pH Meter Indicator Potentiometer Abstraction Representative User Interaction

6.  General Approach  Before titrant is added  Buffer region(s)  At equivalence point(s)  Beyond equivalence point (titrant in excess)  Approximations  Hiccups where it should be smooth Calculation Method

7. Calculation Method (cont.) Is Analyte Strong? Weak Analyte Calculations Strong Analyte Calculations Yes No Buffer Equivalence Point Titrant in Excess

8. SituationEquation Some Equations Used Strong Acid in Excess Buffer Region Henderson-Hasselbalch Equation Pure Weak Acid

9. 1M HCl vs 1M NaOH 1M NaOH vs 1M HAc 4M NaOH vs 4M H 3 PO 4 Demonstration NaOH vs H 3 PO 4

10.  Expanded Titration Functions Accurate pH Titrations (done w/ Fortran)  Redox, Gas Phase, and Complexometric Titrations  First step towards an answer engine for chemistry Titration  Thermodynamic Properties  Kinetic Mechanisms such as Michaelis-Menton mechanism  Spectrum Analysis: UV-Vis, IR, Raman, NMR, and Mass Spectrum Future Work

11. Physical Chemistry III class and Dr. Yingbin Ge’s Research Group Department of Chemistry Acknowledgements

12. Harris, D. C. (2010). Quantitative chemical analysis (8th ed.). New York: W.H. Freeman and Co.. McQuarrie, D. A., & Rock, P. A. (2011). General chemistry (4th ed.). Mill Valley, CA: University Science Books. References

13. Questions and Comments?