Did you recognize that you have the right to use salt water to do a light pear shine? It sound crazy, however it"s yes, really! This is due to the fact that saltwater is a good conductor of electrical power which makes s water a resource for renewable energy.

You are watching: Does salt water conduct more electricity than freshwater

Salt molecules room made of salt ions and also chloride ions.

(An ion is one atom that has an electric charge since it has either acquired or shed an electron, also an interpretation it has a hopeful charge and a negative charge.)

When you put salt in water, the water molecules pull the sodium and also chlorine ions apart therefore they are floating freely, increasing the conductivity. These ions are what lug electricity through the water v an electrical current. In short, saltwater (water + salt chloride) can help to produce electricity. If this deserve to be excellent on a big scale, let"s shot a small-scale fun science project to see how it works! A project choose this would certainly make a good science fair project for primary school or center school.


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DIY Saltwater Circuit Project

What friend Need:

Masking tapeWater (can it is in tap water)Salt (table salt)Aluminum foilWhat friend Do:Wrap two tongue depressors in aluminum foil. These will be her electrodes.Cut 3 6-inch piece of insulated copper wire and strip a half-inch the insulation turn off each end.Take the 2nd piece that wire and also connect the light pear socket with one of the electrodes. Usage masking tape to stick the bare end of the cable on the aluminum foil close to the optimal of the electrode.Use the third piece of cable to attach the an unfavorable terminal that the battery v the various other electrode.Test out your circuit by poignant the 2 electrodes together. This should finish the circuit and enable electricity to flow from one terminal of the battery come the other, lighting increase the light pear in the process. If the pear doesn"t light up, examine your wire relations to make certain they are all secure, and also then shot again.

How to test a Circuit in Water

Pour 1 cup that water right into a cup or beaker. (If you have distilled water, that will occupational best.)Put the 2 electrodes in the cup, but don"t permit them touch every other. What happens to the light bulb?Remove the electrodes native the cup and also then stir in a teaspoon of salt until it dissolves. Placed the electrodes in the saltwater without poignant them together. Clock the light bulb.

The light bulb lit up since the sodium and chlorine ions carried out the electricity (an electric current) from one electrode to the other. This perfect the basic circuit, causing the light bulb to shine.

Try adding more table salt and see if the light pear shines brighter. Use a buzzer instead of a irradiate bulb and see if an ext or much less salt in the water renders the buzzer ring enlarge or softer.

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If you desire to try another scientific research experiment, girlfriend can finish this solar distillation job to gain fresh water out of saltwater and then use your saltwater circuit to test the water girlfriend distill! Freshwater won"t command electricity and also saltwater.