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Reconisting Bases
Names of Bases end in Hydroxide
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Acids
Have sour taste; form acid solutions; release hydrogen ions when desolved in water; turns litmus red and universal indicator from red to yellow
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Bases
Neutralise acid solutions; have soapy feel and bitter taste;turn litmus blue and univeral indicator from blue to violet
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Alkali
water soluble base
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pH scale
Measures the acidity or basic-ness of a substance. It is a scale that ranges from 0-14 with 0 being a stronger acid and 14 being a strong base and 7 being a neutral substance
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Reactions with acid and metals/metal compounds
meatal salts
most reactions form metal salts to write the name of a metal salt we take the metal used then add the modified name of the acid used, eg when HCl is used we get a metal chloride, when Nitric acid is used we get a metal nitrate, when sulphuric acid is used we get metal sulphate, and when ethanoic acid is used we get metal ethanoate
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Metal + oxygen =
metal oxide
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Metals + Water
= Metal hydroxide + Hydrogen gas
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Metals + Acids
= metal salt + hydrogen gas
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Metal hydroxide/Metal Oxide + acid
(neutralisation reaction)
Metal salt + water
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Metal Carbonate + Acid
= Metal salt + Carbon dioxide + water
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reactivity of metals
- Most Reactive - Potassium, Sodium Lithium, Calcium, Magnesium, Aluminium, Zinc, Iron, Hygrogen, Lead, Copper, Silver - Least reactive
- Elements after Hydrogen are very slow in reacting and Hydrogen doesnt react at all
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