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Arrhenius theory (acids):
Acids produce hydrogen ions (H+/H3O+/hydronium ions) in aqueous solution.
Arrhenius theory (bases):
Bases produce hydroxide ions (OH-) in aqueous solution.
Lowry-Bronsted theory
An acid is a proton (H+ ion) donor and a base is a proton (H+ ion) acceptor
strong acids
ionise completely in water to form a high concentration of H3O+ ions. Examples of strong acids are hydrochloric acid, sulphuric avid and nitric acid.
weak acids
ionise INcompletely in water to form a low concentration of H3O- ions. examples of weak acids are ethanoic acid and oxalic acid.
Strong bases
dissociate completely in water to form a high concentration of OH- ions. examples of strong bases are sodium hydroxide and potassium hydroxide.
weak bases
dissociate INcompletely in water to form a low concentration of OH- ions. examples of weak bases are ammonia, calcium carbonate, potassium carbonate, calcium carbonate and sodium hydrogen carbonate.
dilute acids/bases
Contain a small amount (number of moles) of acid/base in proportion to the volume of water.
equivalence point of titration
The point at which the acid/base has completely reacted with the base/acid
endpoint of a titration
the point where the indicator changes colour