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