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Chemical Reactions and Equations, Colour Changes Chemical Reactions,…
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Oxidation and Reduction
Oxidation reaction is the one where one element gains oxygen and looses hydrogen
Ex - iron metal is oxidised to form iron oxide
These reactions are also called redox reactions
Reduction
Where one element looses oxygen and gains hydrogen to another element
Ex- Mg+ CuO = MgO + Cu
Effects of oxidation reactions
- Rusting - Iron articles have reddish brown coating after few days this costing ie formed when iron reacts with oxygen in the air and forms iron oxide
- Rancidity - Fast food going bad in smell and taste because food oil reacts with oxygen in the air giving it bad colour and smell
Word and Symbolic Equations
Word equation expressed in words
Symbolic equations uses symbols of the elements
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