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Report on electrolysis
Report on electrolysis
Report on electrolysis
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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
The experiment done in the lab supports the law of Conservation of Mass because we used the reactants and simply rearranged them to create the products without adding or removing anything. For the experiment we used candy and marshmallows. The green candy symbolized carbon atoms, the red ones hydrogen atoms, and the marshmallows represented oxygen atoms; we also used toothpicks which illustrated bonds keeping them all together. The chemical reaction for photosynthesis is the product of six carbon dioxide plus six water atoms is glucose (sugar) plus oxygen. We started by making the food into the reactants, the ingredients for the chemical reaction; six green candy drops and twelve marshmallows plus twelve red candy drops and six marshmallows.
5. A second test tube was then filled with water and placed in a test
The ills that McMillan is satirizing are the most common PowerPoint mistakes. He focuses on the incorrect uses of various PowerPoint techniques. For example, he used satire to explain that using excessive bullet points can cause your key messages not to stand out. He also mentioned that putting every word you are going to say in a slide can result in losing your audience’s attention. Additionally, McMillian explained that using too many graphs just to impress your audience is not necessary.
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.
CL-, as the ions of H+ and OH- react to form H2O. These spectator ions
* We would have to leave one end open to fill it up with the different
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.
Obtain a sample of metal that has been immersed in boiling water and place it in the cup of water.
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
of Copper Sulphate. To do this I plan to work out the amount of water
It is also important we keep the colour and size of the cross the same this will help keep the results fair for the experiment. Another thing we must do is to make sure that the beaker is completely clean and free of any water or any other substance before we attempt to start the next experiment.
== § Test tubes X 11 § 0.10 molar dm -3 Copper (II) Sulphate solution § distilled water § egg albumen from 3 eggs. § Syringe X 12 § colorimeter § tripod § 100ml beaker § Bunsen burner § test tube holder § safety glasses § gloves § test tube pen § test tube method = == = =
second test tube also add 6 mL of 0.1M HCl. Make a solution of 0.165
In my experiment, I will use an overall volume of 50 cm³ of 2moles of
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.