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

To investigate Electrolysis affecting amounts of substances at Anode+ and Cathode-

Extracts from this document...


Steven Pemberton Chemistry Investigation To investigate Electrolysis affecting amounts of substances at Anode+ and Cathode- Prediction I predict that the longer the electricity is passed through the Anode and Cathode the more effect it will have on them. The anode will be less in weight than the cathode due to it increasing in weight. Safety The experiment there are a few safety rules that will have to be taken into consideration. The main safety rule is that when the investigation is taking place the anode and cathode must not be touched in fear of an electric shock. When the investigation is being completed electricity must be turned off with care being careful not to touch anode and cathode together. If anode and cathode were to touch then a spark would appear and a fire may be started or some kind of serious injury may occur. Method You will need: * Measuring Cylinder (to measure the amount of ionic solution to use) * An ammeter to record and watch the amps * A 400ml beaker (for the reaction to take place in) * Stopwatch (to time the reaction) * A power pack to supply the electricity for the experiment to take place. ...read more.


To help prove and support the results that follow there is the electrolysis laws carried and found by Faraday. Here are a couple of quotes that Faraday stated to do with electrolysis. Faraday's First Law of electrolysis states that: "The mass of any element deposited during electrolysis is directly proportional to the number of coulombs of electricity passed" This means that the element left on the cathode is corresponding in size to the number of coulombs of electricity passed through the anode and cathode. Faraday's Second Law of electrolysis states that: "The mass of an element deposited by one Faraday of electricity is equal to the atomic mass in grams of the element divided by the number of electrons required to discharge one ion of the element." This means that the collection of an element gathered up by one Faraday of electricity is equivalent to the atomic mass in grams of the element divided by the number of electrons needed to absolve one ion of the element. It has also been discovered that the copper anode releases copper ions and electrons, which form copper at the cathode. At the anode (+): Cu(r) Cu2+(r) 2e- At the Cathode (-): Cu2++ 2e-(r) ...read more.


Evaluation My experiment went well with me results being quite precise. If I were going to do this experiment again I would have to consider changing and altering the equipment to get the best results possible. First of all I would make all my measurements of the chemicals accurate leaving no tolerance, using a measuring cylinder. Then I would clean the equipment to prevent there being any dirt or other chemicals present which could affect the results because the other chemicals can react and alter the resistance of the electricity. This would then give false results. To make the results accurate I will use the same stopwatch and same pieces of cooper for the anode and cathode. Then I would try to time the reactions more carefully keeping an eye on the time so that I know when to stop the reaction. Also I shall use the same electrical equipment to carry out the experiment with. Basically if I carried out the investigation again I would be cautious to make sure all the equipment was the same and that test were carried fair to give very precise results. With the equipment and my results being accurate the investigation went according to plan with no major problems. Biogeography http://www.creative-chemistry.org.uk/ http://www.gcsechemistry.com St. Cyres Comprehensive School, Chemistry Department, GCSE Course, Topic 8 The Extraction of Metals GCSE Separate Science Chemistry: the Revision Guide: Higher Level Richard Parsons (Editor) Steven Pemberton 11JRI ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Changing Materials - The Earth and its Atmosphere 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 GCSE Changing Materials - The Earth and its Atmosphere essays

  1. Electrolysis - study the effect of current upon the mass of nickel deposited at ...

    This could have been because of the huge area of possible error. All of my results followed a trend apart from one anomalous, which I have circled on my graph. Within this experiment there is a high area of inaccuracy compared to the theoretical values.

  2. The Electrolysis Of Copper (ii) Sulphate Solution Using Copper Electrodes

    This wasn't usually a problem but it did mean that the current wasn't always at the intensity wanted. Both these factors could have had an effect on the results obtained. The same plates should be used for one whole set of results but this wasn't possible.

  1. Investigate the factors that affect the mass of Copper deposited on the Copper Cathode ...

    Therefore it can be seen that a mass of 0.11g was deposited on the copper cathode when using a current of 0.3 amps. I then calculated the theoretical value, which was 0.12g (2dp), and this showed me that the experiment had been successful and therefore meant I was more prepared for my investigation.

  2. Investigating how the amount of copper affects the mass of the cathode

    The atomic masses (Ar) of silver and copper are 108 and 64. Therefore dividing the mass deposited by the right atomic mass gives us: silver copper 1.08 = 0.01 0.32 = 0.005 108 64 The answers obtained have a simple ratio of 2:1.

  1. What Effects the Reaction in the Electrolysis of Copper Sulphate.

    I can do this because I will know how many coulombs I want to pass through the circuit. Below is an example of how this can be accomplished: charge = current X time Therefore: time = charge / current

  2. Are mans activitys affecting global warming

    that these regions have more readily accessible climatic data and more comprehensive programs to monitor and study environmental change, in part to the disproportionate warming that has been observed over the mid-to-high-latitude continents compared to other regions during the last century, and in part to emphasize the importance of the

  1. Investigation into Electrolysis

    solution onto the cathode, variables will affect the amount of plated metal produced. Variables including the reactivity of the metal involved, the concentration of the solution and the surface area of the metal in contact with solution affect the amount of plated metal.

  2. Chemistry- Earth, its structure and atmosphere

    How did Oxygen get into the atmosphere? Early bacterial life introduced oxygen to the atmosphere. As the first free oxygen was released through photosynthesis by cyanobacteria, it was initially soaked up by iron dissolved in the oceans and formed red coloured iron oxide, which settled to the ocean floor.

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