Obtaining and using metals

Obtaining and using metals

Redox Reactions

OILRIG= Oxidations Is Loss, Reduction Is Gain (in terms of electrons)

An oxidation reaction involves gaining oxygen. E.g when metals react with oxygen, metal oxides are produced. When a substance is oxidised, it always looses electrons

A reduction reaction involves loosing oxygen. E.g when a metal oxide looses oxygen and returns to their normal form. When a substance is reduced, it gains electrons.

Reactivity Series

• When metals react with other substances, they always form positive ions 
• The easier it is to form a positive ion, the more reactive the metal is
• Metals can be arranged in order of their reactivity

Metals that react with dilute acids:

• Magnesium
• iron
• lead
• aluminium 
• zinc

Metals that don't react:

• Copper 
• silver
• gold 
• …