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Slide 1

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Acids & Bases
·3.3.46 ­ recognise that acids dissolve in water,
producing hydrogen ions (H+), that alkalis dissolve in
water producing hydroxide ions (OH-) and that
neutralisation is the combination of these ions to form
·3.3.47 ­ recognise that a base is a metal oxide or
hydroxide and that an alkali is a soluble base.…read more

Slide 2

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An acid is any substance which produces
H+ ions or H3O+ ions in water.
H+ ions are called hydrogen ions,
H3O+ ions are called hydroxonium ions.…read more

Slide 3

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Examples of Acids.
The three common acids you will find in
the laboratory are
1) Hydrochloric acid - HCl(aq)
2) Nitric acid - HNO3(aq)
3) Sulphuric acid - H2SO4(aq)
They are all strong acids ­ ( have a pH of 1,
red).…read more

Slide 4

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Forming Acids
They all ionize in water to form hydrogen
ions (H+ ions).
1) HCl H+ + Cl- (chloride)
2) HNO3 H+ + NO3- (nitrate)
3) H2SO4 2H+ + SO4-2 (sulphate)…read more

Slide 5

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Non-metal Oxides
The Oxides of non-metals are acidic.
When non-metal gases dissolve into water
acids are produced:-
CO2 - carbonic acid, H2CO3,
NO2 - nitric acid, HNO3,
SO2 - sulfuric acid, H2SO4.
Non-metal oxides dissolve in water to give
acidic conditions, metal oxides give basic
conditions and water is the only neutral
oxide.…read more

Slide 6

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Properties of Acids.
They have a pH less than 7.
They will turn blue litmus paper red.…read more

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