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Salt Water Energy

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on 12 March 2015

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Transcript of Salt Water Energy

Can salt water produce energy?
Why does salt water conduct electricity?
How is this related to battery?
Chemical energy stored in different substances can be converted to electrical energy. This ability is the foundation design of all batteries. Which means the chemical energy that is stored in the salt can be converted into electrical energy when it’s added to water. So which means battery and this experiment have the same concept on producing electricity, and this is how salt water is related to battery.
What are the parts of a battery?
Batteries have three parts, an anode (-), a cathode (+) and the electrolyte. The two terminals that are made of different chemical, are the cathode and anode. The electrolyte which separates these two terminals is a chemical medium that allows the flow of electrical charge between the cathode and anode. To do that electrolyte contains ions that are both positive and negative. Electrolyte is also a medical/scientific term for salt, specifically ions.
My conclusion is yes, salt water can conduct energy(electricity) and my hypothesis was right. This experiment proves that salt water can conduct energy. I've also learned that if you keep adding salt to the water it doesn't increases its ability to conduct energy.
How does the amount of salt in a solution affect the solution’s ability to conduct energy?
The amount of salt in a solution affect the solution's ability to conduct energy because when you add more salt to the solution, the solution's ability to conduct energy doesn't increases. This is because if nothing else happens in the solution besides the Na+ going to the anode and the Cl- going to the cathode. Then when the ions reach their electrodes nothing else in the solutions will move and so it will stop conducting energy and stay at its current level.
On paper
Salt Water Energy
The cathode and anode (positive and negative sides at either end of a traditional battery). The electrolyte is located in the middle (in between the cathode and anode).
Hypothesis: Yes, salt water can produce energy.
Salt is an ionic compound and when you add salt into water, it dissolves into the water and so ions are available in the liquid. Water which is also known as distilled water is pure and free of salt, so it is a very poor conductor of electricity. But by adding in ordinary table salt to the distill water, it becomes an electrolyte solution, that are able to conduct electricity.

Materials Method
-Small glass jar
-Measuring spoons
-Zinc-coated nail
-Copper-coated wire
-2 insulated wires with alligator clips on both ends.
-Graph paper, optional
1. Make a saltwater solution by mixing a small jar of water with a teaspoon of salt.
2. Place a zinc-coated nail into the solution, and tape it to one side of the cup securely. This will be the negative electrode.
3. Place a copper-coated wire into the solution, and tape it to the other side of the cup securely. This will be the positive electrode.
4. Open the alligator clip on one wire by squeezing it, and attach it to the end of the zinc-coated wire sticking out of the solution.
5. Open the alligator clip on the other end of the wire, and attach it to the negative pole of the voltmeter.
6. Repeat Steps 4 and 5 to connect the copper-coated nail to the positive pole of the voltmeter.
7. Look at the dial on the voltmeter. How much current does it show flowing between the two electrodes?
8. Add another teaspoon of salt to the water. How much current does the voltmeter show now? Continue adding teaspoons of salt and recording the reading on the voltmeter in a chart.

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