We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Chemical Lab Report Essay Sample

essay
The whole doc is available only for registered users OPEN DOC

A limited time offer!

Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed

Order Now

Chemical Lab Report Essay Sample

Abstract
The purpose of the lab was to determine the order of reaction for the dye Red #40. By measuring the reaction rate between bleach and the dye, the order of the reaction was determined to be first order.

Introduction
The study of kinetics is important for studying the amount of time it takes for a particular reaction to reach completion. By comparing two solutions of dye that have different concentrations, the reaction rate can be experimentally found. At this point, reaction rates can only be determined experimentally and cannot be calculated. The equation Rate=k[Dye]y can be determined for all its variables, but because the second part of the lab was not completed, the entire rate law equation of Rate=k[OCl-]x[Dye]y cannot be determined because changes in the bleach concentration were not measured. The experimental data will be analyzed using Beer’s Law. By plotting the data in an excel graph, the slope will give the concentration of the dye over time in seconds. With this information, the “y” value can be calculated and the rate law equation completed.

Results
OCl- + H2O + 2e-(dye) 2OH- + Cl-
[NaOCl]=6.15%
[Red dye #40]=3.989×10-3
Molar Absorptivity of Red dye #40 = 2.7×104 abs*mol-1*cm-1
Trial| Trial 1— [dye]=6×10-5 M| Trial 2 – [dye]= 8×10-5 M| Reaction
Time| 150 seconds| 150 seconds|
Wavelength| 499 nanometers| 499 nanometers|
Absorbance| 1.436| 1.852|

Data

Trial| Trial 1 – [dye]= 6×10-5 M| Trial 2 – [dye]= 8×10-5 M| Slope of Concentration vs. Time| -2.96×10-7| -6.30×10-7|

Discussion
This kinetics lab studies the reaction rate of a particular dye and NaOCl, also known as bleach. The rate equation for this particular reaction is Rate=k[Dye]y. The concentration of the dye was known, the rate of the reaction was experimentally found, and then the “y” value was calculated. By analyzing the graphs of comparing concentration and time, especially the natural log graph because it had the best R2 value, the reaction was determined to be a first-order reaction. In the end, the lab showed how chemical kinetics in equation form can be applied to real experimental data.

We can write a custom essay

According to Your Specific Requirements

Order an essay
Get Access To The Full Essay
icon
300+
Materials Daily
icon
100,000+ Subjects
2000+ Topics
icon
Free Plagiarism
Checker
icon
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access
immediately?

Become a member

Your Answer Is Very Helpful For Us
Thank You A Lot!

logo

Emma Taylor

online

Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59
Become a Member