Product identity was confirmed by melting point oC and infrared spectroscopy lack of aromatic hydroxide signal, presence of ester carbonylas well as a successful FeCl3 test, indicating a high level of purity of the product. Aspirin synthesis from salicylic acid. Note that a percent error for a melting point has abolutely no significance and should never be reported Both are low by 1 degree, and given similar melting point depression constants, would have similar levels of impurities.
Acknowledgments References Below, the top text gives instructions for what you should be focusing on in that section and the bottom gives an example.
Title Design a title that is not too vague and not so specific that you end up writing a 3 sentence title.
A bad, vague, example would be "Influence of various factors on amylase activity". A good setup is shown below Example Title Influence of pH, temperature, and concentration on amylase activity by: Author's Name Date Abstract Writing the abstract is pretty easy, there is an introduction sentence, then explain what you did in the experiment in the next few sentences and conclude with your results sentences.
Remember to use a past-tense and passive voice throughout the entire lab report. Do not write "We, our, my, ours, I Example Abstract Many animals use amylase, an enzyme found in the saliva, to digest starch to maltose and glucose.
The effect of concentration, pH, and temperature on amylase activity was examined to determine how these factors affect enzyme activity. Activity was measured by measuring the rate of disappearance of starch using I2KI, a color changing indicator that becomes purple in the presence of starch.
The results suggest that as concentration of amylase decreases, the rate of starch digestion decreases. Similarly with pH, as it deviates away from 6. Overall, the results suggest that enzyme activity may be affected by factors such as concentration, pH, and temperature.
Introduction The introductions is a longer version of the abstract without the "methods" or "results" part. Essentially you are introducing a reader to your topic and it's background. You are also writing a hypothesis and telling your reader what that hypothesis is.
So remember, introduction has two important parts: Background on topic Hypothesis Figures: If you reference figures or tables in your report, you can choose to integrate them as you go, or put them all at the end of your lab report attached as a separate paper after the references section.
It makes formatting easier. Example Introduction The kinetics of a reaction, its rate, is usually established by measuring the amount of substrate consumed or the amount of products formed as a function of time.
An assay is usually performed to determine this type of information. The rate of a reaction depends on more factors than the three examined. In addition to temperature, pH, and concentration other factors such as the structure of the substrate, the amount of concentration of the substrate, the ionic strength of the solution, and the presence of other molecules that can act as activators or inhibitors1.
For the factors that were examined it was predicted that as amylase concentration decreases the enzyme function decreases as measured by the rate of starch digestion. For pH it was predicted that as it deviates from 6.
The effect of concentration, pH, and temperature on amylase were examined to determine how these factors affect enzyme activity. The importance of enzyme inhibition was studied in an experiment in which Inhibition of starch digestion by alpha-amylase inhibitor reduced the efficiency of utilization of dietary proteins and lipids and slowed the growth of rats.
The study saw that at the two highest levels of amylase-inhibitor 3. The mechanisms for starch digestion of amylase depend on the class of the amylase enzyme. There are four groups of starch-converting enzymes: Figure 1 summarizes the different methods of cleavage.
Regardless of the method of cleavage, all of the classes of amylase enzymes can be affected by concentration, pH, and temperature.
Do not explain results or discuss them here. The methods section can be written as separate paragraphs for each different experimental set up you had to perform or can be split off into subsections each with its own subtitle.
This was repeated for all 5 tubes and the respective times were recorded. Twenty-four well plates were prepared with ul of I2KI.
This was repeated for all 6 tubes and the respective times were recorded. This was repeated for all 4 tubes and the respective times were recorded.If your instructor gives you an outline for how to write a lab report, use that. Some instructors require the lab report be included in a lab notebook, while others will request a separate report.
Here's a format for a lab report you can use if you aren't sure what to write or need an explanation of what to include in the different parts of. Chemistry 1 Introduction Qualitative analysis is a method used for identification of ions or compounds in a sample.
In many cases, qualitative analysis will also involve the separation of ions or compounds in a Write the formulas of each solid with its characteristic color. Write a title that captures what is important about the lab, including the scientific concept the lab isabout and variables involved, the procedure, or anything else .
Jun 14, · Chemistry Blog Tuesday, June 14, Foul Water Lab Report Post Lab: Electrical conductivity is the way to test whether or not water contains salt. Since salt is a conductor, if an electrical current is present when the water is placed under a light bulb, it will light up.
Foul Water Lab Report; Monday, June 13th Homework. ME Student Writing Guide Lab Reports - 5 E Lab Report Elements A report is created using these characteristics. Self-Supporting Document. Question 4: Write the half-reactions for the reducing agents in order, from weakest to strongest.
(Hint: Remember that reducing agents get oxidized.) Question 5: The strongest oxidizing agent is said to have the most positive potential and the strongest reducing agent has the most negative potential.