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

Find out whether or not changing the depth of the electrolyte affects the current.

Extracts from this document...


Aim: My aim is to find out whether or not changing the depth of the electrolyte affects the current. If so, is there a connection

Method: I will set the experiment up as shown in the diagram. I will increase the depth of the electrolyte by 25ml each time. I will repeat the experiment 3 times to make sure I can spot any anomalous results. This way my results will be more accurate.

Scientific Prediction: I predict that as I increase the depth of the electrolyte the current will be increased. By increasing the depth of the electrolyte it increases the surface area or the electrodes. By increasing the surface area the rate of reaction has increased,

...read more.











Once I had made the adjustments I took my real results.

Depth (ml)

Voltage (V)

Current (A)

Current (A)

...read more.


Evaluation. I did not recognize any anomalous results; this is probably because I only had one variable and nothing else changed.

The line was easy to draw as it was nearly straight and passed through the origin. If I were to repeat the experiment I would to 5 repeats to make my results more valid. If I wanted to do an extension to my work . I could change the shape of the electrode, which would again change the surface area, so I could have flat electrodes instead of round ones. My results and graph still support my prediction.

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics 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 AS and A Level Electrical & Thermal Physics essays

  1. The electrolysis of copper from copper sulphate solution

    Average Current (Amps) (2dp) 1 0.53 0.8 0.31 0.6 0.23 0.4 0.14 0.2 0.09 0 0 Now I need to work out how many moles of electrons there are in coulombs for each concentration. Time MULTIPLIED BY Current Quantity of Electrons Quantity of Electricity DIVIDED BY 96000 Moles of electrons

  2. Investigating how temperature affects the resistance in a wire

    The heat in the water bath for recordings at certain temperatures can disperse easily to it's surroundings especially when high temperature are used. So to stop this the desired temperature in the water bath is kept constant with the monitoring of a thermometer and consequent adding of hot (from the kettle)

  1. How does the mass of copper plated in the electrolysis of copper sulphate solution ...

    The disadvantage of this is that the bigger the current the bigger the mass changes on the electrodes therefore this would lead to more accurate results The Other Factors The factors I am going to keep constant are going to be Time, Temp, depth of solution, separation of the electrodes and the Concentration of the copper sulphate solution.

  2. Assess how changing the electric current in the electrolysis of acidified water affects the ...

    All other possible variables must be controlled. These include: * Position of the electrodes within the solution - moving the electrodes closer together is a way of varying the current. It was found in the preliminary work that moving the electrodes closer together caused an increase in the current.

  1. Electrolysis of Copper Sulphate Solution.

    100% 50% Evaluation My Method could have been better I could have been better I could have measured the copper sulphate and water more accurately. My results are not very accurate because they do not form a smooth curve and do not fit in totally with my scientific knowledge.

  2. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    These are as follows: PREDICTED VALUES Resistivity, 40 micro ohm meters Length 0.05m, Voltage, 3V Cross-sectional area experiment Cross-sectional area of putty(A)/m2 Current(I) / A 0.000064 0.096 0.000128 0.192 0.000192 0.288 0.000256 0.384 0.00032 0.48 0.000384 0.576 0.000448 0.672 The UNILAB values can again be used to back up these

  1. My aim is to find out by changing the depth of the copper changes ...

    When 5cm of copper is in the solution a higher current is needed to get the same effect. If more of the copper touches the solution the more it can react, therefore increasing current. Apparatus list: * Copper * Cylinder 100cm * Beaker * Copper Sulphate Solution 100ml * Voltmeter

  2. Investigating the factors that affect the conductance of a solution

    I predict the rate of the conductance is directly proportional to the concentration. This is because in solutions, the process of electrolysis conducts electricity, which is when the compound dissociates into its constituent ions. These ions then carry the charge from one electrode to the other.

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