• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

FACTORS THAT AFFECT THE LIGHT ABSORBED BY A TRANSITION METAL COMPLEX How does the concentration of Nickel Sulphate solution affect its absorbency of light?

Extracts from this document...


FACTORS THAT AFFECT THE LIGHT ABSORBED BY A TRANSITION METAL COMPLEX How does the concentration of Nickel Sulphate solution affect its absorbency of light? Hypothesis: As the concentration increases the absorbency increases. Variables Independent variable: Concentration of Nickel Sulphate Solution Dependent variable: Absorbency of light Controlled variable: Volume of Nickel Sulphate Solution Light Wavelength Light Intensity Path Length Type of Chemical Solution Method: Materials: - 1M Nickel Sulphate Solution (NiSO4(aq)) - Deionized water - Graduated Pipettes (2, one for nickel sulphate, one for water) - Pipette Balls (2) - Cuvettes (10) - Beakers - Colorimeter - Non-Scratch Wipes - Glass Droppers - Computer - Launch Datastudio software - Labels In this experiment concentration of the Nitrate Sulphate solution is being varied to determine effect on absorbency of light. These concentrations will be made from dilutions of Nitrate Sulphate solution provided. The dilutions are as follows: Concentration of NiSO4(aq) (mol dm-3) Volume of 1M Aqueous NiSO4 Solution (cm3) Volume of deionized water(cm3) ...read more.


When the green light is not blinking, it should be lit and steady. 15. Click 'Start' on the software. If the colorimeter is not calibrated to zero, start again. Testing it would ensure that there will be no systematic error in the results and the readings would be accurate. Using the colorimeter and collecting data: 16. Insert the cuvette with one that has 1.00 mol dm-3 NiSO4 solution. 17. Press 'Start' on the software. 18. A horizontal line at the level of absorbance should appear on the graph. 19. To show only the reading, click on 'Meter'. 20. Record the reading on the data table. 21. Repeat steps 9, 16-20 for the 9 other cuvettes of different dilutions. 22. Results will be recorded on a table. The mean average of the absorbency will be calculated later.Plot these values onto a graph using the Microsoft Excel computer programme. Data & Results Rough Collected Data Concentration of NiSO4 (mol dm-3) (see Graphs and Calculations for Uncertainties) ...read more.


In the hypothesis it was stated that according to the prediction the graph would approximately resemble the graph drawn below (right). The real graph is shown below (left). They are similar: The accuracy of the results however does not conclude the hypothesis. The errors were relatively small and appear to be random however; the trend line does not fall within the error bars on the graph, meaning the few sets of results could change the accuracy of the investigation. These errors are not ideal; hence, more repetitions of the data would most likely have eliminated these after multiple repetitions. These are probably small human errors which would not be eliminated by changing the apparatus used. In all this experiment, it proved the hypothesis; hence, it was a success as we could draw firm conclusions from the data generated. In the future, further work could be done to expand our knowledge of transition metal complexes and their light absorbing qualities by experiment on different variables. ?? ?? ?? ?? IB Chemistry Year 12 d block Chemistry Investigation Medora Choi ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Chemistry essays

  1. IB chemistry revision notes

    Factors Affecting the Position of Equilibrium * Concentration o If we increase the concentration of the reactants, the point of equilibrium shifts towards the products (right), to make more products. So, the concentration of the products increases while that of the reactants decreases.

  2. Investigate the rate of reaction of luminol in various factors. The objective was to ...

    130.78 103.72 79.53 60.31 53.25 54.43 46.90 36.78 23.82 20.38 Time 2 (s) 133.17 102.47 82.69 64.97 57.56 54.19 47.85 36.47 22.50 19.97 Time 3 (s) 132.69 103.97 85.31 66.09 55.25 53.69 49.84 33.06 25.56 21.47 Time 4 (s) 131.84 105.87 82.10 65.03 56.72 52.75 47.10 34.00 25.41 20.78 Average time (s)

  1. Absorbance of light by a transition metal complex investigation

    This is probably due to the saturation of colour of the solution. In addition, the graph also indicates that the relationship starts at the origin and is generally linear at lower concentrations. In this investigation, Nickel (II) Sulphate will be used as the transition metal and H2O will be used as the ligand.

  2. Electrochemical cells - investigate the effect of the temperature change of the anode electrolyte ...

    of 3 Zinc metal, then clean them until they appear metallic shine, then put Zn strip into the solution of ZnSO4 and Mg strip into the solution of MgSO4. 3. Use the clamps to stable the Zn and mg, keep their immersion depth are the same.

  1. Group 4

    Alloys are partial or complete solid solutions of one or more elements (metallic or/and non-metallic) in a metallic lattice. Alloys usually present different properties from those of the elements composing them. Alloying one metal with one or more metals or non-metals often improves the properties of the starting elements.

  2. Experiment Plan. Chemistry IA: Electrolysis of Metal Sulphate solutions (NiSO4)

    Therefore, when the current is increased, the nickel ions flow faster and reaching the cathode faster. So there will be more nickel deposited as the rate of electrolysis is increased. Independent and Dependent Variables Variable measured Method of measuring variable Independent variable Magnitude of current flowing into the electrolytes (A)

  1. Electrolysis of copper sulphate

    Reaction at the cathode: Cu2+ + 2e- â Cu ∴moles of Cu= moleselectrons2â 0.00024870466322= 0.00037375415 moles 1. To find Mass of Cu mass = moles x Molar Mass = 0.001243523316 x 63.5 = 0.024 g of Cu deposited (2.s.f) 1.

  2. The chemistry of atmospheric and water pollution.

    Thus the earth?s heat is trapped in the stratosphere, raising the temperature of the earth. This small increase in temperature can have huge effects on aquatic organisms such as plankton who cannot cope with this change. Thus organisms dependant on plankton (food chain)

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work