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 Form 4 Chemistry lessons on electrochemistry

Meaning and terminologies used in electrolysis

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Answer Text:
ELECTROLYSIS
Definition
-Is the decomposition of molten or aqueous solutions by passage of electric current through it.
Terminologies used in
electrolysis:
i) Electrolyte
- Is a solution which allows electric current to pass through while it gets decomposed.
- Electric current transfer in electrolyte occur through ions.
- The electrolyte can be aqueous solutions or molten solutions
- Electrolyte with may ions are called strong electrolyte; while those with few ions are called weak electrolytes.
Examples
ii) Electrodes - Are the solid conductors, usually roots, which usually complete the circuit between electrolytes and cell/battery
- Are of two types
a) Anode - The electrode connected to the positive terminal f a battery/cell
b) Cathode- Electrode connected to the negative terminal of the battery/cell.
Note: Graphite rods are commonly preferred as electrodes in most access.
Reasons: They are inert/unreactive
-Are cheap
- Platinum is also relatively inert; but not less preferred to Graphite because its expensive.


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