Sign In
Not register? Register Now!
Essay Available:
You are here: HomeLab ReportLife Sciences
Pages:
1 page/≈550 words
Sources:
No Sources
Level:
MLA
Subject:
Life Sciences
Type:
Lab Report
Language:
English (U.S.)
Document:
MS Word
Date:
Total cost:
$ 7.2
Topic:

Lab Report for Stoichiometry of a Metal Complex (Lab Report Sample)

Instructions:
The experiment was to determine the absorbance of metal complex made of Fe2+ (aq) and ortho-phenanthroline source..
Content:
Name Tutor Course Date Lab Report for Stoichiometry of a Metal Complex Introduction Fe (II) ions combine with ortho-phenanthroline to form Fe (II) metal complex. Its absorbance was determined using the stoichiometry methods. Fe 2+ (aq) + "n" (ortho-phenanthroline) (aq) = Fe (o-phenanthroline) n2+ The experiment follows the premise that the metal complex produced absorbs visible light strongly, with a maximum absorbance of 510 nm. It is also known that the aqueous ferrous ion absorbs an insignificant amount of light at the wavelength, as well as the ortho-phenanthroline molecule. From Beer’s law, A= εbC, light absorption by a complex metal A is directly proportional to the molar concentration, C, of the respective complex with the path length, b, and the molar absorptivity ε being constant. Colour appearance accompanies the formation of a complex compound. To determine the amount of complex ion in the solution, measurement of the absorbance of the solution is conducted. As the number of metal complex ions increase in the solution, the absorption increases proportionally. If the number of Fe2+ ions was maintained constant, the increase in the number of moles of the ortho-phenanthroline leads to an increase in the number of the Fe (II) complex in the solution and, therefore, the absorbance increases until all the ions are utilised. Procedure The Fe (II) solution was prepared in a clean volumetric flask using ferrous ammonium sulphate salt in distilled water, hydroxylamine sulphate and sodium sulphate. 0.26 grams of the salt was dissolved in 20 millilitres of distilled water, the solution was labelled as stock A. the molarity of the solution was measured. 5 grams of hydroxylamine sulphate and sodium sulphate each were slowly added to a volumetric flask and shaken to dissolve with 25 millilitres of the stock A, transferred to the flask using a pipet. The solution was comprised of Fe (II) solution. A 10 ml volume of the Fe (II) solution was transferred to a 100 ml volumetric flask and diluted with distilled water. The spectrophotometer was calibrated in readiness for the experiment using this solution. A 10 ml solution of the Fe (II) solution was then placed into a volumetric flask, and ortho-phenanthroline added. The initial and final volumes in the flask were noted. The flask was then filled with distilled water to the mark and the contents poured into a clean dry beaker. The cuvette was rinsed with a small portion of the solution. It was filled and inserted into the spectrometer. The absorbance values were recorded. Data Grams of sodium sulfate: 5.1293g Grams f hydroxylaminesulfate: 4.9595 Molarity of ortho-phenothroline: 0.00242 Sample number ML Fe(II) mL a-phenilflos K I F O-phen used abs 1 10.0 0 0 0 0.00 0 2 10.00 22 2.63 4.74 2.11 0.171 3 10.00 24 4.74 8.62 3.88 0.337 4 10.00 26 8.62 14.91 6.29 0.554 5 10.00 28 14.91 22.82 7.91 0.719 6 10.00 12 22.82 33.66 10.84 0.804 7 10.00 15 33.66 48.18 14.52 0.808 8 10.00 ...
Get the Whole Paper!
Not exactly what you need?
Do you need a custom essay? Order right now:

Other Topics:

  • Stoichiometry to Determine Percent Yield
    Description: The stoichiometry of a chemical reaction is the arithmetic relationship between the products moles and the reactants moles for the reaction...
    4 pages/≈1100 words| 2 Sources | MLA | Life Sciences | Lab Report |
  • Biology: Nervous System Lab Report (Results and Discussions)
    Description: Compare the bundling of nervous tissue with that of muscle tissue. They are similar! Include a discussion of connective tissue arrangement....
    2 pages/≈550 words| 1 Source | MLA | Life Sciences | Lab Report |
  • Lab Report for Gay Lussac's Law: Gas Volumes Used
    Description: Lab Report for Gay Lussac's Law and how gases combine. An experiment was carried out to determine the mole ratio of unknown gas a...
    4 pages/≈1100 words| No Sources | MLA | Life Sciences | Lab Report |
Need a Custom Essay Written?
First time 15% Discount!