More Electrochemistry And Electrical Information

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For Electrochemical cells, there is more information you need to know. For the following electrochemical cell (draw in below space):

























1) Where oxidation half cell occurs ( Cu0 --> Cu+2 + 2 e-), called Anode (also "-" battery terminal (usually black cover).


2) Where reduction half cell occurs ( 2 Ag<sup1+</sup> + 2e- --> Ag0), called Cathode (also "+" battery terminal (always red cover).


3) In an electrochemical cell, electrons Flow from Anode To CAThode, therefore the complete phase to memorize is:

LEO the lion goes GER and is a FAT CAT


4) Since all electrical circuit must be a complete circle, there is an issue in an electrochemical cell. The electrons flow from anode container to the cathode container but the electrons can not flow through the aqueous solution (water do not have any free flowing electrons for the electrons to move through). So you must put something into the water to complete the circuit (hence why pure water is not electrically conductive). For the circuit to be complete (and eletricity to flow) you must have negative ions in the solution. These negative ions complete the circuit.


More Electrical Energy Terms you need to know

a) Voltage (V) - chemical/electrical potential between the reactant of electrochemical cell and the products. Voltage is specific to chemicals in cell

b) Amperage (A) -


c) Watt - Electrical Power (Electrical Energy / Time)

Equation:

d) Watt - Hr (usually as kilowatt-hr, KWH): Total amount of Electrical Energy (this is what your parents see on their electrical bill)























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Last edited February 8, 2012 9:23 am (diff)
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