A Student-Designed Potentiometric Titration:: Quantitative Determination of Iron(II) by Caro's Acid Titration

• Joyce R. Powell ^[1] ; Sheryl A. Tucker ^[1] ; William E. Acree ^[1] ; Jennifer A. Sees ^[2] ; Lindsey H. Hall ^[2]
  1. [1] University of North Texas

     University of North Texas

     Estados Unidos

     
  2. [2] Texas Instruments, Dallas
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 73, Nº 10 (October), 1996, págs. 984-985
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • A laboratory experiment involving the feasibility of using Caro's acid, H2SO5, as a titrant in the potentiometric determination of iron (II) is presented. Specific items considered in the experiment include (i) method of endpoint detection; (ii) shelf-life stability of titrant; (iii) accuracy, relative precision and experimental uncertainty; and (iv) which common cations and/or anions (if any) interfere with the titration. Typical student results gave iron (II) concentrations within 1-2 % of the "true" values. Of the 14 cation/anion pairs suggested in the paper, only time(II) was found to interfere with the quantitative determination of iron (II) using Caro's acid titrant.