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

Plan for an electrolysis experiment to determine the relationship between the current and the amount of metal deposited at the cathode.

Extracts from this document...


NAME : NABILA FATHA BINTI MOHD NOR MIMBAR CLASS : M12G TITLE : FACTOR AFFECTING THE ELECTROLYSIS DATE : September 14, 2013 INTRODUCTION Electrolysis is the decomposition of a molten or aqueous compound by electricity. The electrolysis process occurs only in liquids called electrolytes. If the electrolytes is in molten or aqueous state, there are presence of mobile ions which allow current to flow in the electrolyte. Thus, electrolyte can conduct electricity but not in solid state. Example : Diagram below show the ions present in an electrolyte in different state. AIM RESEARCH QUESTION There are many factors that affect the mass of metal deposited on the cathode which are surface area of electrodes, concentration of electrolyte, time, current and temperature. Thus, in this experiment, the current used in the electrolytic cell is chosen as the manipulated variable to determine the relationship between the current and the amount of metal deposited at the cathode. ...read more.


sulphate solution 200ml Propanone A bottle region Distilled water A bottle Ammonia solution 50ml Tissue A role Emery paper 10 small pieces Table 3 : the materials for the experiment APPARATUS QUANTITY SIZE UNCERTAINTY Variable resistor 5 Standard size - Ammeter 5 Standard size ±0.1A Beaker 5 250ml ±0.5ml Power supply 5 Standard size - Red and black wire 20 Standard size - Stopwatch 5 - ±0.1s Crocodile clip 10 Standard size - Electronic balance 1 Standard size ±0.1g Wooden mat 1 - - Table 4 : the apparatus needed in the experiment with the uncertainties PROCEDURE 1. Set up the apparatus as shown in the diagram above. 2. Clean one of the two copper electrodes with emery paper on a wooded mat to remove impurities such as oxide layers and grease also to ensure that the copper cathode is pure. ...read more.


The resistor maintains a low and steady current. Left the apparatus for 20 minutes and the time was measured by using a stop clock. 9. After 20 minutes, remove the copper cathode from the copper (ii) sulphate solution. 10. Wash the copper gently with distilled water and propanone and then dry the cathode in the air. Remember not to rub the cathode. Distilled water is used to remove copper (ii) solution and the propanone is used to rinse away the water because propanone is a volatile liquid which it will quickly evaporate. 11. Re-weigh the cathode and record the mass thus the amount of copper deposited at the cathode can be calculated. 12. Carried the experiment with different current (0.2A, 0.4A, 0.6A, 0.8A and 1.0A) twice for each current. RESULTS / DATA COLLECTION Current, I (A) Initial mass of copper electrode, (g) Mass of copper electrode after 20 minutes, Mass of copper deposited, (g) 0.2 Trial 1 Trial 2 0.4 Trial 1 Trial 2 0.6 Trial 1 Trial 2 0.8 Trial 1 Trial 2 1. ...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. Electrochemical cells - investigate the effect of the temperature change of the anode electrolyte ...

    cause eye irritation, and it may be irritation to the skin and may cause sensitization reactions. Contact with eyes and skin should be avoided through the use of safety goggles. - When pour the chemical, it needs to be carefully - Regular skin contact with zinc sulphate can cause skin


    (see Graphs and Calculations for Uncertainties) Absorbency Uncertainty 0.1 0.33 0.2 0.48 0.3 0.67 0.4 1.00 0.5 1.00 0.6 1.11 0.7 1.20 0.8 1.28 0.9 1.34 1.0 1.41 Observations: - Nickel Sulphate solution was green in color and the deonized water was colorless. - The more concentrated the solution was the darker the green color of the solution.

  1. Kinetics of the Acid-Catalyzed Iodination of Propanone

    For one experimental group in particular, that for Solution D for group 3, the members were unaware of such fact until after a great deal of time had passed as a disagreement between the group as to when to stop timing despite the hue had prevented them from calculating at

  2. Absorbance of light by a transition metal complex investigation

    Place the cuvette labeled "0.03125mol" into the colorimeter - press start and stop after getting a constant reading 22) Record the data 23) Repeat steps 21-22 until all labeled cuvettes have been measured for red absorbance Data Table Concentration / mol dm-� Red light (660nm)

  1. To determine the molecular mass of an unknown alkali metal carbonate, X2CO3.

    Part 2: Determining number of moles in 2.0g of substance Z. Since 2.0g was used to make 250cm3, 25cm3 of solution is assumed to have 0.20g of X2CO3. Moles of HCl = 0.0037moles. Therefore, 0.20g had 0.00185moles of X2CO3. Therefore, molecular mass of X2CO3 = = 108.1g/mol Atomic mass of

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

    The 5 values I will use for current flowing into the electrolytes will be: 0.5 amps 1.0 amps 1.5 amps 2.0amps 2.5 amps To vary the values of current, a variable resistor will need to be used in the ciruit to control the flow of current.

  1. Electrolysis of copper sulphate

    Be sure not to write on the side that will go into the solution as this could inhibit oxidation or reduction! 4. Weigh the cathodes using the electronic balance and record this value as initial mass for each of the cathodes (C1 ? C5).

  2. To determine the standard enthalpy of formation of Magnesium Oxide using Hess Law.

    85 38.0 25 35.0 90 37.1 30 35.5 95 36.5 35 36.2 100 35.8 40 36.5 105 34.9 45 37.2 110 33.8 50 37.9 115 32.9 55 38.5 120 32.6 60 39.2 Max Recorded 40.4 Table 4: Data Collection: Part X, Trial 1.

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