Electrolysis Experiment

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Recommended: Voltage effect on rate of electrolysis

Electrolysis Experiment

Aim:

To find out how current affects the rate of electrolysis.

Pre-test:

Pre-test Apparatus:

1. Power Pack

2. Stop watch

3. 3 wires

4. Amp meter

5. A piece of Card

6. stop watch

7. Top pan balance

Pre-test Method:

Text Box:

1. Check to see if all the apparatus work by forming a small circuit

with a bulb

2. Collect apparatus and set them out like the diagram below. Ensure

that the positive wire leads to the anode and the negative leads to

the cathode.

3. Measure out 50 ml of copper sulphate

4. In to a small class beaker

5. Weigh cathode on top pan balance

6. Slide anode and cathode in to piece of card and place in

electrolyte

7. Turn on the power pack

8. Time until two minutes

9. Weigh cathode make sure you do not scrape off any copper

10. Repeat three times

11. Repeat for each current

Pre-test Findings:

By doing this pre-test I have learnt that:

* The analog amp meter is very unreliable it

* To be very accurate I need to use a multi meter

* To be careful not to scrape of copper when measuring weight

* Make sure that the anode and the cathode do not touch during the

experiment

* Make sure wires and power packs are working before you start

* To change the electrolyte after each experiment

* To use a stop watch instead of a clock as it is more accurate

* To use a variable resistor to get the exact current you need

Research:

There are many factors that affect the rate of electrolysis:

· The current

· The dept of the electrodes

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