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# Analyzing First Order Kinetics - cis-trans isomerization of mercury dithizonate

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• Essay length: 730 words
• Submitted: 20/06/2006
University Degree Mathematics

The first 200 words of this essay...

The Hong Kong Polytechnic University

Bsc(Hons) in Chemical Technology

Chemistry Laboratory III

Laboratory Report

Inorganic Chemistry Experiment 6

Title: Analyzing First Order Kinetics - cis-trans isomerization of mercury dithizonate

Name: KO KA LEE

Student ID: 02183698D

Class: 12047-2

Aim:

The purpose of this experiment is to analyze first-order kinetics and rate constant by using four general methods:

1. Half-time method

2. Semi-log method

3. Guggenhein's method

4. R/R? method (ratios of rates).

Results and Data Treatment:

Half-time Method

From the data obtained (Appendix 1), a graph of absorbance Y(t) against time is plotted.

Graph 1

For 1st order kinetics,

t = t1/2

y t1/2 = (y0 + y? ) / 2

From the data,

y0 = 0.2969208

y? = 0

y t1/2 = (0.2969208 + 0) / 2

= 0.1484604

From Graph 1,

At absorbance 0.1484604, t1/2 = 21.5s

By kobs = ln2 / t1/2 ,

kobs = ln2/ 21.5

= 0.0322 s-1

Semi-log Method

A graph of Z(t) =

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