Prev. Article Next Article Table of Contents

Article

An Undergraduate Physical Chemistry Experiment on the Analysis of First-Order Kinetic Data

Citing Articles

Your current credentials do not allow retrieval of the full text.

Purchase the full-text

PDF/HTML,
figures/images,
references and tables,
(where available)

M.R.K. Hemalatha and I. Noorbatcha

Department of Chemistry, Universiti Malaya, 59100 Kuala Lumpur, Malaysia

J. Chem. Educ., 1997, 74 (8), p 972

DOI: 10.1021/ed074p972

Publication Date (Web): August 1, 1997

Section:

History, Education, and Documentation

Abstract

The first order kinetic data obtained for the reaction:

S₂O₈^2- + 2I^- --> 2SO₄^2- + I₂

under pseudo first order conditions is analyzed using the conventional method (Method I), Guggenheim method (Method II) and a similar method proposed by Kezdy et al, Mangelsdorf and Swinborne (Method III). The latter methods are known as time lag methods and they do not require a knowledge of initial and infinite time measurements for the determination of rate constants. These methods are also useful for the prediction of infinite time readings. All the three methods provide results of similar accuracy, if accurate initial and final readins are available. Our present work clearly brings out the approximation involved in assuming a measurement made at finite time as "infinite time reading" in Method I. Between the two time lag methods that we have investigated, Method III is easier to implement.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Kinetics

View: Hi-Res PDF | PDF w/ Links

Citing Articles

View all 9 citing articles

Citation data is made available by participants in CrossRef's Cited-by Linking service. For a more comprehensive list of citations to this article, users are encouraged to perform a search in SciFinder.

This article has been cited by 9 ACS Journal articles (5 most recent appear below).

Modern Developments in the Physical Chemistry Laboratory
Samuel A. Abrash
2007 973 (), 115-151
- Modern Developments in the Physical Chemistry Laboratory
  Samuel A. Abrash
  2007 973 (), 115-151
  Developments in the physical chemistry laboratory since the publication of the germinal text by Schwenz and Moore (1) are categorized and reviewed. The categories examined include modern instrumentation, current topics in chemistry, integrated ...
  Abstract | Hi-Res PDF | PDF w/ Links
Design of an Excel Spreadsheet To Estimate Rate Constants, Determine Associated Errors, and Choose Curve's Extent
Ruben Elvas-Leitão , Luís Moreira and Filomena Martins
Journal of Chemical Education2006 83 (12), 1879
- Design of an Excel Spreadsheet To Estimate Rate Constants, Determine Associated Errors, and Choose Curve's Extent
  Ruben Elvas-Leitão , Luís Moreira and Filomena Martins
  Journal of Chemical Education2006 83 (12), 1879
  In this article we wish to present a new Microsoft Excel spreadsheet design that enables a prompt calculation of rate constant values (k) and associated errors and also addresses less common features such as the choice of experimental curve's extent. The ...
  Abstract | Hi-Res PDF | PDF w/ Links
New Highlights on Analyzing First-Order Kinetic Data of the Peroxodisulfate-Iodide System at Different Temperatures
J. Yperman , W. J. Guedens
Journal of Chemical Education2006 83 (4), 641
- New Highlights on Analyzing First-Order Kinetic Data of the Peroxodisulfate-Iodide System at Different Temperatures
  J. Yperman , W. J. Guedens
  Journal of Chemical Education2006 83 (4), 641
  A pseudo-first order kinetic experiment examining the peroxodisulfate–iodide system was performed using an automated undergraduate chemistry lab experiment. The kinetic study was executed at different temperatures. This format makes it possible to ...
  Abstract | Hi-Res PDF | PDF w/ Links
Using a Graphing Calculator To Determine a First-Order Rate Constant (author replies)
José E. Cortés-Figueroa
Journal of Chemical Education2004 81 (4), 485
- Using a Graphing Calculator To Determine a First-Order Rate Constant (author replies)
  José E. Cortés-Figueroa
  Journal of Chemical Education2004 81 (4), 485
  When technology is used to help with mathematical calculations, the emphasis must be on the concepts being learned rather than simply the procedures.
  Abstract | Hi-Res PDF | PDF w/ Links
Using a Graphing Calculator To Determine a First-Order Rate Constant
Todd P. Silverstein
Journal of Chemical Education2004 81 (4), 485
- Using a Graphing Calculator To Determine a First-Order Rate Constant
  Todd P. Silverstein
  Journal of Chemical Education2004 81 (4), 485
  Commentary on the use of graphing calculators to estimate the infinity reading from linearized kinetics data, and then they use linearized semi-log data to determine the first-order rate constant.
  Abstract | Hi-Res PDF | PDF w/ Links