This document is a revision booklet for BTEC Applied Science Level 3 Unit 5 chemistry, which is an examined unit in applied science. This booklet covers ALL topics in unit 5, chemistry, in an organised way.
Bases
They are substances that accept taking up H+(hydrogen ions/protons),
usually to make water.
Acid + base = salt + water
Bases Sometimes get call proton acceptors.
Alkali
It is a base that can dissolve in water.
Alkalis often have a hydroxide ion, OH
Common Bases and alkalis:
Sodium hydroxide
Potassium hydroxide
Ammonium hydroxide
Sodium hydrocarbonate (bicarbonate of soda, in baking powder)
Metal oxides and hydroxides
Both metal oxides and metal hydroxides can behave as bases.
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