Finding the Change in the Mass of the Electrodes During Electrolysis
Safety:
Before carrying out he investigation we had to take safety into
consideration so we wore goggles to protect our eyes from any harmful
chemical and aprons to protect our clothes from anything that may get
spilt.
Equipment:
1x 250 ml glass beaker
1x power pack
1x ammeter
4x wires
Copper Sulphate solution
2x Copper electrons
1x Variable resistor
Weighing scales
1x stop clock
Propane
[IMAGE]
Method:
Set up the apparatus as shown above in the diagram. In order to
collect evidence that was valid we made sure the copper electrodes
were thoroughly clean by removing any old copper with wire wool to
ensure a fair test. We put both pieces of copper in a 250 ml glass
beaker that was filled with CuSo4 (electrolyte) solution. We then used
the power pack and the variable resistor to set the current at (a
pre-decided) 1Amp.
Firstly we weighed and recorded the mass of the positive and negative
electrode (Anode and Cathode). Using the stop clock for accurate and
fair timing, we recoded the mass of the electrodes at 5, 7,9,11 and 13
minuets. We then repeated this procedure twice more to obtain a good
set of results.
(In the second and third experiment we decided not to record the
change in mass of the negative electrode because we felt there were
too many things that could alter the accuracy of the result, such as
water washing of newly formed copper or even newly formed copper being
lost in the solution or being brushed of onto aprons accidentally,
resulting in an unfair test).
The results are shown in the table below.
Prediction:
I think that more copper should be deposited on the cathode (negative
electrode -ve) so it's mass should increase. This is this is because
the positive copper ions (Cu2+) are attracted to the cathode from the
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
3. The beaker was filled with water and the metal was placed in the water.
How am I going to make it a fair test I will use a clean flask for
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The bell was cast using a mixture of 80% copper and 20% tin with the addition of one
Journal: when i was doing my experiment the first thing i had to do was get my materials that are 1) clear drinking glass 2)¼ cup of vegetable oil
Remove the metal object from the first beaker and insert it into the second one.
Obtain a sample of metal that has been immersed in boiling water and place it in the cup of water.
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5. A second test tube was then filled with water and placed in a test
If you're embarrassed by hair on your lip or chin and you're tired of removing it constantly, then electrolysis could be the solution. Electrolysis removes hair permanently. It's safe for use on facial hair, and it frees you from having to pluck or shave unwanted facial hairs ever again. Here's some information on how it works.
Weigh out two 0.100 g. samples of the product and put each into a test
In my experiment, I will use an overall volume of 50 cm³ of 2moles of
How the Rate of Electrolysis is Affected by Changing the Current in the Circuit When chemical compounds are in a molten state, or if they are dissolved in water or other liquids their molecules become "separates into positively and negatively charged components, which have the conduct electricity", or they become ionized [IMAGE]Electrolysis is the process of breaking down or 'decomposing' a compound, by running an electric current through a chemical compound when it is ionized. This is done using a simple circuit, as below: z When a pair of electrodes as above is placed in an ionized solution (Electrolyte) and there is a current flowing between them, the positive ions move toward the negative electrode - cathode and the negative ions move towards the positive electrode - anode. The ions that move towards the cathode are called "cations" and the ions that move toward the anode are called "anions". When the ions reach their respective electrodes, they gain or lose electrons and are transformed into neutral atoms. Electrolysis of molten lead bromide: [IMAGE] The electrolyte is Molten Lead Bromide As is above, the ions gain or lose electrons at the electrodes.
of Copper Sulphate. To do this I plan to work out the amount of water