How Batteries work?
Yoz everyone,
So, we have all learnt how to create a battery using a fruit.
Now, Energizer actually has quite an interesting website on the working of Alkaline battery. http://www.energizer.com/learning/howbatterieswork.asp
Please visit the website and discuss in the 'comments' section:
1. What is the cathode of the battery.
2. What is the anode of the battery.
3. What electrolyte is used in the battery.
4. What reactions takes place at each electrode? Give the half equations.
5. How does electrons flow?
In addition, quite a number of you asked how a rechargeable battery works. The same website has a short description of it. You might want to read it too.
The human electrolyte? Do you think we can act as electrolytes?
Picture taken from http://www.exploratorium.edu/snacks/hand_battery.html
So, we have all learnt how to create a battery using a fruit.
Now, Energizer actually has quite an interesting website on the working of Alkaline battery. http://www.energizer.com/learning/howbatterieswork.asp
Please visit the website and discuss in the 'comments' section:
1. What is the cathode of the battery.
2. What is the anode of the battery.
3. What electrolyte is used in the battery.
4. What reactions takes place at each electrode? Give the half equations.
5. How does electrons flow?
In addition, quite a number of you asked how a rechargeable battery works. The same website has a short description of it. You might want to read it too.
The human electrolyte? Do you think we can act as electrolytes?
Picture taken from http://www.exploratorium.edu/snacks/hand_battery.html
Labels: Extension, Reactivity Series, Redox
posted by Potassium Hydroxide | 8:11 PM
2 Comments:
human electrolyte -
"In one of these reactions, your hand takes negatively charged electrons away from the copper plate, leaving positive charges behind. In the other reaction, your hand gives electrons to the aluminum plate, causing it to become negatively charged. "
wrong, isn't it? "gives electrons to aluminium plate"... Aluminium is electropostive, it wouldn't accept electrons..
unless it's a case that is actually very different from electrolysis.
Al, being the more reactive metal, will lose e to form Al3+ ions. Hence I believe Jot is rite.
But Jot, remember that this is not electrolysis. This is an electrochemical cell where we derive electrical energy from chemical energy.
In electrolysis, a battery is needed (we will learn more in Term 3). Here, electrical energy is used to cause chemical reaction.
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