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Question:

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by

Danica K

on 8 December 2013

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Transcript of Question:

Science Fair Experiment
Made By:
Peace for the Planet with
PENNY POWER!

Alisha Bajaj 803
Esha Karia 803
Danica Khithani 803

Hypothesis
Procedure
To create each penny battery we first gathered the pennies made after 1986 as those pennies had the most zinc in them.
Next we traced and cut out the cardboard into circles as large as each penny.
We then placed six cardboard pieces into vinegar, lemon juice, and acetone.
To make the battery itself we started with a 5 cm by 3 cm piece of tinfoil.
Then we layered the zinc washer, soaked cardboard then penny until we used all the cardboard.
Materials
Vinegar
Nail Polish Remover
Lemon Juice
Electrical Tape
Card Board
Zinc Washers
Pennies
Voltage Meter
Recyclable Cups
L.E.D. Light Bulbs
Aluminum Foil
Calculator
Lantern
Question
Which acidic household product can connect the anode and the cathode to create the most electricity and last the longest from a penny-powered battery?



Our hypothesis was that
lemon juice
would produce the most volts of electricity in a penny battery and be the longest lasting.

"Acidic" and "Basic" are two extremes that describe the chemical properties of chemicals.
The term “pH” is a measure of the acidity of a solution.
A solution's acidity is determined from the presence or absence of hydrogen ions.

Conclusion
Why
vinegar
did work?

V
inegar was a slow evaporating liquid. It was able to stay damp for a longer period of time on the cardboard proceeding to be the longest lasting.
The lemon juice lasted for some time, but not as long as the vinegar because it isn’t as slows of an evaporator. Thus, the lemon juice did not last as long as the vinegar because it evaporated faster.
Therefore, vinegar can create the best electrical flow between the anode and cathode. It can generate the most volts and be the longest lasting electrolyte in a penny-powered battery.


The 3 products we are testing are vinegar, lemon juice and nail polish remover.
Vinegar has a pH value between 2.4-3.4, lemon juice is 2.3 and nail polish remover/acetone is 14
Our prediction was that lemon juice would last the longest and create the most amount of electricity due to its high acidic pH level.


Our hypothesis was incorrect. It seemed that
vinegar
lasted the longest and had the most electrical volts.
Lemon juice
lasted the second longest and still created a decent amount of volts, and
acetone
didn’t generate any electricity and showed a negative voltage.


After, we connected the LED light to the tinfoil and the penny on the top.
We wrapped the entire circuit with electrical tape and we checked the voltage every half an hour to see how it was working.
We were able to tell how the battery was working by checking if the LED bulb was still on.
Since February 2013, the pennies are not circulated and often go to financial institutions, and will later be melted. The metal content will then be recycled.

However, have you ever thought of trying to make use of these pennies at home? Using our "Penny Power" - alternative way, people can be more self-sufficient with the use of pennies to create electricity even in their own homes. GO PENNY POWER!
Our Recommendations...
Hypothesis
We found that acidity didn’t matter as much compared to which liquid evaporates faster or slower. For instance, nail polish remover is a solvent, capable of disintegrating even plastic. This explains why it works so quickly breaking apart and removing your nail polish.
Therefore in our experiment, fast evaporating liquids are not as effective. When cardboard was soaked in nail polish remover the remover dried up quickly not providing enough fluid to create an electrical flow between the cathode (positive) and anode (negative) of the battery. This is why the acetone-powered LED light resulted in not even turning on, and a negative voltage.
Why nail polish remover did not work?
Penny
Power

Procedure continued...
What were our results?


Our Recommendations
Thank You
Penny Power!
Full transcript