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

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

Extracts from this document...

Introduction

Chemistry IA: Electrolysis of Metal Sulphate solutions (NiSO4) Introduction Electrolysis is the chemical decomposition of a compound by applying an electric current through a solution containing ions. Electrolytes are required to conduct electricity. They must be dissolved in water or in molten state for the electrolytes to conduct because then, the ions are free to move allowing the solution to be electrolyzed.[1] In electrolysis, reduction happens at the cathode whilst oxidation happens at the anode. Reduction is the loss of electrons and oxidation is the gain of electrons. Research Question In this experiment, I will be electrolyzing nickel sulphate (NiSO4) solution. To further explain the aim of this experiment, I have formulated a research question: ?How does changing the current affect the mass of nickel deposited at the cathode in the electrolysis of nickel sulphate?? Hypothesis I predict that as the electrical charge increases, the mass of nickel deposited at the cathode after electrolysis will also increase. Faraday?s law of electrolysis, which investigates the quantitative relationship on electrochemical, can support this. Faraday?s law states, ?The amount of the substance produced by current at an electrode is directly proportional to the quantity of electricity used?.[2] During this electrolysis experiment, the aqueous solution of Nickel Sulphate will transfer Nickel from the anode to the cathode. ...read more.

Middle

Volume of solution (cm3) The volume of nickel sulphate for each trial will be kept at 100cm3. Measuring cylinders will be used for accurate measurement. Time (min) The timing for the experiment needs to be controlled very carefully to ensure the amount of current passing the electrolytic cell will have the same amount of time. For each trial, it will run for 2 minutes. This will be determined using a stopwatch. Voltage (V) To keep the voltage of this experiment constant set at 5V, we only need to switch the power pack to 5V and keep it there. Distance between electrodes (mm) The distance between the nickel electrodes needs to be kept constant so it doesn?t affect the amount of current passing. The distance will be kept at 40mm and this will be measured using a ruler. Surface of electrodes Before using the electrodes in the experiment, sand paper will be used to remove the oxide layer on the sheet of nickel. This will ensure the surface of all electrodes to be the same and will have the same surface for ions to attach to. Size of electrodes The electrodes need to be kept the same size to ensure there will be an equal surface area for nickel to deposit on. ...read more.

Conclusion

Final Mass of Cathode (±0.001g) Change in mass (±0.001g) Average mass gained (±0.002 g) Current (A) Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 0.5 1.0 1.5 2.0 2.5 Data table The table above is a draft up of the raw data results table I will be using for my final readings from the experiment. It includes columns with headings, 3 trials, units and uncertainties and the average mass gained from the whole experiment. From these results, I can also draw a graph to easier represent the data and can also spot patterns or anomalous data that occur in the results. The actual theoretical mass of nickel deposited at the cathode can also be calculated with a few equations: Charge (C)= Current (A) x Time (s) Moles of electrons= Charge (C)/ 96500 Moles of Nickel= moles of electrons/2 Mass= moles x RAM The total percentage of random uncertainty can be calculated for my final answer in order to determine whether my experiment was fully successful and that the results are accurate. Wires Crocodile clips Stopwatch Sandpaper Ruler Electronic balance ________________ [1] Neuss, Geoffrey. IB Study Guide: Chemistry: Study Guide. [s.l.]: Oxford UP, 2007. Print. [2] "Faraday's laws of electrolysis". Encyclopædia Britannica. Encyclopædia Britannica Online. Encyclopædia Britannica Inc., 2012. Web. 04 Oct. 2012 <http://www.britannica.com/EBchecked/topic/201755/Faradays-laws-of-electrolysis>. ...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

    * The Halogens (Group VII) o As you go down the group, the anionic ionic radius increases. o Anions have a larger atomic radius than the parent atom they come from, because they gain an electron in the outer shell. The electrostatic repulsion makes the outer shell expand.

  2. Investigating Solutions. In this experiment the effect of concentration of different solutions will be ...

    also on the nature of the ions present (through their charges and mobilities), and conductance behaviour as a function of concentration is different for strong and weak electrolytes. " 3 The first conclusion coincides with my hypothesis however the second conclusion does not correlate completely.

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

    At the same time, record the voltage shows in the voltameter. 7. Set up the hot plate; put the anode electrolyte MgSO4 and Mg on the hot plate in order to raise temperature of anode electrolyte. 8. While anode electrolyte up to the certain temperature of 30�C, 40�C,50�C,60�C and 70�C, measure and record their average voltages.

  2. Investigating the effect of ion concentration in electrolytes on the potential difference in a ...

    A possible explanation for this may be that the distilled water was contaminated with ions. The result of this would be that other ions can be reduced and oxidized as well, and this would render the results inaccurate.

  1. FACTORS THAT AFFECT THE LIGHT ABSORBED BY A TRANSITION METAL COMPLEX How does ...

    Delete graphs. The graph will only show data for the chosen wavelength. Testing the colorimeter: 9. Use non-scratch wipes to clean the outsides of all the cuvettes so that there would be minimal interference with the light shone through the solution and so that we would get an accurate reading.

  2. IB Chemistry Kinetics Exam Questions and Answers

    The concentration of oxygen is much lower than that of nitrogen This may be true and concentration does affect reaction rate, but this isn't the best answer for two reasons 1) the question says "under normal conditions" which implies that at higher temperatures the nitrogen and oxygen would react a lot more quickly at the same concentration.

  1. Electrolysis of copper sulphate

    Sixth current reading is 1.2 amps. Total Quantity of charge = Current Ax TimeS â 1.2 x 120 =144 Coulombs 1. To find number of electrons transferred. Number of e- =Total Quantity of ChargeCharge of 1e- â1441.60217733x10-19= 9 x1020electrons 1.

  2. Paper Chromatography on Amino Acids IA

    as the literature value was not exactly the same as the value obtained. Limitation Improvement Overall, the paper chromatography technique was not the best technique to use as there could be many errors that occur. It does not allow for separation of complex mixtures and can?t be applied for a large sample quantity.

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