Lesson 6.1 Batteries - Clare Peters-Libeu | Library

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How many times do you charge your phone per day?

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The easiest way to extend the life your cell phone battery is to

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What takes the most power?

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Habitually charging your phone off the computer battery decreases the life of the computer battery because the computer battery

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Two strategies for extending the life of your phone's battery are to

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Draggable item		Corresponding Item
net charge		negative end of the battery
electrolyte		positive end of the battery
cathode		substance that allows positive and negative ions to move inside the battery
anode		total amount of positive and negative charge in a location

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In the alkaline battery, the electrons are removed from one metal and returned to another metal. Which metal is the electron donor? (which one makes a positive ion)

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When a metal is reduced, it is accepting electrons. In which substance does manganese have the lowest positive charge?

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In a rechargeable battery, the chemical reaction that releases electrons is forced to run backwards (the products become reactants)

Pay attention to this explanation. This is what we are going to build in the lab.

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Oxidation means to

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Reduction means to

Non-aqueous means that the liquid does not contain water. Oil and Nail polish remover (acetone) are examples of non-aqueous liquids.

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What are some strategies that scientists are exploring to make longer life batteries?

Batteries convert chemical energy into electrical energy. They have two electrodes—called a cathode and an anode—where chemical reactions that either use or produce electrons take place. The electrodes are connected by a solution—called an electrolyte—through which ions can move, completing an electrical circuit. In this activity, the salt provides ions that can move through the wet paper towel and transfer charge.

To generate electrical energy, this battery relies on a chemical reaction which releases electrons from the aluminum foil at the anode, and a chemical reaction involving oxygen at the cathode, which absorbs electrons. The movement of electrons through an external circuit generates an electric current that can be used to power simple devices. A diagram of the battery is shown below:
 
Aluminum foil provides an affordable supply of aluminum. Activated charcoal, which is mostly made of carbon, can conduct electricity and is non-reactive. It provides a highly porous surface that is exposed to oxygen in the air. One gram of activated charcoal can have more internal surface area than an entire basketball court! This surface provides a large number of sites to which oxygen can bind and participate in the cathode reaction. At the cathode, each oxygen atom is absorbing two electrons and becoming oxide. The aluminum at the anode is supplying the electrons. Each aluminum atom can give away three electrons.

This large reaction area makes it possible for the simple aluminum–air battery to generate one volt (1 V) and one hundred milliamps (100 mA). This is enough power to run a small electrical device and provides a safe and easy way to make a powerful battery at home or in school.

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Match the substances in the battery with their chemical roles

Draggable item		Corresponding Item
circuit		electron donor
alligator clips		home for the oxygen
anode reaction		electron acceptor
cathode reaction		electrolyte
oxygen		electrons absorbed
salt water		electrons donated
aluminum		path for the electrons
carbon		complete path that allows electrons to travel from anode to cathode

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Why is oxygen a good choice for a battery component? (Be sure to use a periodic trend in your answer)

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Do a little research about air batteries. What are some of the possible applications that scientists and engineers are exploring?

Be sure you come prepared on Thursday with your handwritten procedure that includes all the steps to make the air battery!

Curious about how people are thinking about using air batteries.