pls help and explain
Spectrophotometric determination of nitrite
Specific guidelines for practical report
Title: A brief description of the experiment.
Aim: A concise statement describing the objective of the experiment.
In your words describe the relevant theory for the experiment, using balanced equations where applicable. DO NOT simply reproduce what is in the laboratory manual; rather demonstrate that you have an understanding of the relevant background applicable to this experiment. This should not exceed half a page.
Materials and procedure
Generally it is sufficient to state �as per laboratory manual, p.xx�, unless authorised changes have been made. In this case details of the changes should be described.
Dilution of test sample: Record details of the dilution of test sample.
Visual observation: Record the visual appearance of assay samples.
Analytical data: Record the absorbance of each solution at 540 nm. The suggested format for a table to record this data is detailed below (remember to give the table a title):
Table �. (give title)
Nitrite Solution ( mg L-1) absorbance
Diluted sample 1 0.1753
Diluted sample 2 0.2326
Data interpretation and calculations
Comment on the visual interpretation of the colour of the diluted sample as compared to the standards.
Plot a standard curve using the absorbance values (y axis) and nitrite concentrations (x axis) for the blank and standards. The graph must be hand drawn on graph paper.
Using the standard curve, estimate the nitrite level in the diluted test samples (show lines of interpolation).
Calculate the nitrite level in the undiluted sample taking into account the dilution factor.
Calculate a relative spread for the absorbance values of the two diluted samples to indicate the precision of your test.
Clearly state the concentration of nitrite in the unknown sample – be sure to use appropriate units.
Provide a brief discussion of the results obtained, including possible sources of error in the experiment and how these may affect the results.
Discuss techniques of interpolation and extrapolation. Which of these is more accurate?
Explain why the test sample needed to be diluted.
Based on your calculated concentration of nitrite in the sample, is the water suitable for drinking?
Is your calculated nitrite level comparable to the expected value for this sample?
Our Service Charter
Excellent Quality / 100% Plagiarism-FreeWe employ a number of measures to ensure top quality essays. The papers go through a system of quality control prior to delivery. We run plagiarism checks on each paper to ensure that they will be 100% plagiarism-free. So, only clean copies hit customers’ emails. We also never resell the papers completed by our writers. So, once it is checked using a plagiarism checker, the paper will be unique. Speaking of the academic writing standards, we will stick to the assignment brief given by the customer and assign the perfect writer. By saying “the perfect writer” we mean the one having an academic degree in the customer’s study field and positive feedback from other customers.
Free RevisionsWe keep the quality bar of all papers high. But in case you need some extra brilliance to the paper, here’s what to do. First of all, you can choose a top writer. It means that we will assign an expert with a degree in your subject. And secondly, you can rely on our editing services. Our editors will revise your papers, checking whether or not they comply with high standards of academic writing. In addition, editing entails adjusting content if it’s off the topic, adding more sources, refining the language style, and making sure the referencing style is followed.
Confidentiality / 100% No DisclosureWe make sure that clients’ personal data remains confidential and is not exploited for any purposes beyond those related to our services. We only ask you to provide us with the information that is required to produce the paper according to your writing needs. Please note that the payment info is protected as well. Feel free to refer to the support team for more information about our payment methods. The fact that you used our service is kept secret due to the advanced security standards. So, you can be sure that no one will find out that you got a paper from our writing service.
Money Back GuaranteeIf the writer doesn’t address all the questions on your assignment brief or the delivered paper appears to be off the topic, you can ask for a refund. Or, if it is applicable, you can opt in for free revision within 14-30 days, depending on your paper’s length. The revision or refund request should be sent within 14 days after delivery. The customer gets 100% money-back in case they haven't downloaded the paper. All approved refunds will be returned to the customer’s credit card or Bonus Balance in a form of store credit. Take a note that we will send an extra compensation if the customers goes with a store credit.
24/7 Customer SupportWe have a support team working 24/7 ready to give your issue concerning the order their immediate attention. If you have any questions about the ordering process, communication with the writer, payment options, feel free to join live chat. Be sure to get a fast response. They can also give you the exact price quote, taking into account the timing, desired academic level of the paper, and the number of pages.