Investigation of Positively and Negatively Charged Electrons
To try and find out if positively charged electrons deposit to the
negatively charged electrons. This means, the electrons in the cathode
attract electrons from the anode so they move towards the cathode from
the anode.
Prediction:
I think that as the electrons move from the anode to the cathode, the
mass of the anode to the cathode, the mass of the anode decreases
whilst the mass of the cathode increases.
I can support the point I've made above by faradays law which is:
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."
Hypothesis:
The mass of the anode should decrease whilst the mass of the cathode
should increase because positively charged electrons get attracted to
the negatively charged electrons. This too can be supported by
faradays law too:
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."
Independent variable:
Current flowing through the circuit and the Time the it stays in side
the beaker.
Dependent Variable:
Mass of the electrode
Control:
Amount of electrolyte
Apparatus:
· Crocodile clips
· Power pack
· 2 strips of copper
· 10ml silver nitrate
· resistor
· ammeter
· small beaker
· stop watch
Method:
First connect the power pack by plugging it in to the electric socket.
Then connect the crocodile clips to the power pack and from there
connect one piece the crocodile clip to one of the copper pieces.
Before you connect the copper strips to the crocodile clips weigh them
Scanning electron microscopy (SEM) technique was employed extensively through want this study to examine and obtain images of prepared samples. The associated analytical facility of Energy dispersive X-Ray (EDX) analysis was used to identify and quantify the elemental composition of the prepare samples.
Volume's Effect on a Copper Sulphate Solution We are trying to find out if the current though a copper sulphate solutions volume is increased. To find this information out I shall perform an experiment using the following equipment; · 1 power pack · 1 beaker · 2 carbon rods for anode and cathode · 1 ammeter · 1 measuring cylinder · 2 crocodile clip wirers I shall also be using 60cm3 volume of copper sulphate in my preliminary results to decide upon the concentration of copper sulphate and the voltage I shall use. The following diagrams show the step by step process in which I will do my experiment; [IMAGE] [IMAGE] [IMAGE] [IMAGE] I will take 10 readings from 10cm3 to 100cm3. I will repeat my experiment to give my experiment a fair average. I will keep the power pack the beaker the carbon rods the crocodile clips the ammeter the concentration of copper sulphate and the measuring cylinder the same each time I do the experiment this experiment.
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Metals contain a sea of electrons (which are negatively charged) and which flow throughout the metal. This is what allows electric current to flow so well in all metals. An electrode is a component of an electric circuit that connects the wiring of the circuit to a gas or electrolyte. A compound that conducts in a solution is called an electrolyte. The electrically positive electrode is called the anode and the negative electrode the cathode.
Distance between the wick and the base of the copper calorimeter: this distance will be 5cm measured using a ruler and adjusted if necessary. The fuel has been weighed correctly: The fuel will be weighed twice, to ensure accuracy. Make sure there is the right amount of water in the copper calorimeter: to make sure the correct amount of water is in the copper I will use a measuring cylinder, I will accurately fill it to 100cm. I will place the cylinder on a flat surface just to check that the measurement is correct. Make sure fresh water has been placed in the container, so that it isn’t still warm and that the copper calorimeter is also cooled down: by making sure that the water has been tipped away straight after the experiment, should hopefully be enough to make sure it will be replaced, also as we have to note the temperature of the water before we start, it should be noticeable.
Two electrical wires * Stopwatch * Thermometer Method I put a piece of Elodea Canadensis (pond weed) in a test tube and covered it with water. The test tube was then placed in a beaker with a thermometer so that the water stayed the same temperature, this was then placed in a cardboard box with a bulb attached to a voltmeter by the electrical wires so that I could concentrate how much light the plant got. I varied the voltage (intensity) of the bulb and counted how many bubbles of oxygen were created at each voltage in one minute. I tested each voltage three times for accuracy for a minute each time. Results Preliminary Experiment Amount of bubbles Light intensity (lux)
When introduced into an ionic solution, positively charged ions will be electrostatically attracted to the anode and the negatively charged ions will be electrostatically attracted to the cathode. This act of moving ions means that charges are able to move from anode to the cathode and complete the circuit. These moving ions are essentially the same as moving electrons (electricity). This process of putting electrodes into a solution, using a direct electric current (D.C.), and separating chemicals based on their charge is known as electrolysis
The only problem with this experiment is that when the current passing through the battery circuit was at a continual rate there was...
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Time - The longer time can let more copper ions from the anode to the cathode if the current are the same. There are still more factors which can affect the mass deposited during electroplating. 3). Distance between two electrodes - If the distance between the two electrodes is greater, the copper ions require to travel more from the anode to the cathode.
of Copper Sulphate. To do this I plan to work out the amount of water