Lab Report Mn-Steel

Determination of Manganese in Steel Submitted by: ——————- Date of Submission: 27. 03. 11 Objectives: In steel production aside the iron, which is the primary source, some amounts of manganese is used together with carbon. The objective of this experiment is determining the manganese amount in the steel compound by using UNICAM UV-VIS Spectrometer. Theory: Many molecules absorb ultraviolet or visible light. The absorbance of a solution increases as attenuation of the beam increases.
Absorbance is directly proportional to the path length, b, and the concentration, c, of the absorbing species. Beer’s Law states that A = ebc, where e is a constant of proportionality, called the absorptivity. Different molecules absorb radiation of different wavelengths. An absorption spectrum will show a number of absorption bands corresponding to structural groups within the molecule. In this experiment wavelength range between 400-650nm is used in order to detect in the visible range. Steel is an alloy primarily composed of iron with carbon content between 0. 2% and 1. 7% by weight. 1. 5% manganese is may be used too, to provide additional strength for a modest price increase. Carbon and other elements act as a hardening agent, preventing dislocations in the iron atom crystal lattice from sliding past one another. Manganese is essential to iron and steel production by virtue of its sulfur-fixing, deoxidizing, and alloying properties. In order to detect the manganese amount in the compound KIO4 is used to oxidize Mn+2 to Mn +7 since Mn+2 does not absorb in the visible region therefor cannot be detected.
Tungsten lamp is used in the experiment to reach the range between 400-650nm. After the beam comes from the tungsten lamp, it passes through the monocromator to reach the wavelength range which was selected to find the maximum wavelength. After the light passes through the monocromator it goes through the cuvette and then the detector. The cuvette is made of quartz in order to pass the visible light whereas a glass cuvette would absorb it. The Redox Reaction: 5 IO4 – + 2 Mn2+ + 3 H2O ? 2 MnO4 + 5 IO3- + 6 H+ Reagents: KMnO4 KIO4 H3PO4 Unknown Solution

Deionized Water Apparatus: Pipette Beaker Heater UNICAM UV-VIS Spectrometer Quartz Cuvette Volumetric Flask Calculations: Weight of KMnO4 : 0. 09149g Weight of KIO4 : 0. 40807g emax: 525nm Absorbance for the unknown: 0,415 [pic] Conclusion: I: Qualitative and or Quantitative identification II: Error discussion While at the addition step of H3PO4 after 5ml of H3PO4 is pipetted, it was transferred into a volumetric cylinder, and then transferred into the unknown solution and the blank solution. There may have been material loss during the process.
Dilution errors may have been done during the dilution process. There may be some personal errors made while weighing the compounds Any scratch, stain or fingerprint left on the cuvette may cause a shift from the accurate wavelength in the detected value. If any bubbles left in the cuvette while the detection is made will as well as cause wrong wavelength value. Reference: http://teaching. shu. ac. uk/hwb/chemistry/tutorials/molspec/uvvisab1. htm http://www. kimya. boun. edu. tr/webpages/courses/chem308/Determination%20of%20Manganese%20in%20Steel. pdf

Don't use plagiarized sources. Get Your Custom Essay on
Lab Report Mn-Steel
Just from $13/Page
Order Essay
Achiever Essays
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.

Live Chat+1(978) 822-0999EmailWhatsApp

Order your essay today and save 20% with the discount code RESEARCH