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neutralisation reaction
acid + base —— salt + water
salts are ionic compounds
Name the salts that are soluble
Lithium
sodium
potassium
ammonium
nitrate
most chloride, bromide, iodide - except for silver halides
most sulphates - except for barium, calcium, lead (form white precipitate)
most hydroxides are insoluble - except lithium, potassium, strontium, calcium, barium and ammonium hydroxide
Making insoluble salts
pick two solutions that contains the ions you need
e.g. lead chloride - mix lead nitrate with sodium chloride
filter the solution wash and dry (precipitate formed)
Making soluble salts using metal and insoluble bases
need an acid and insoluble base/metal
chloride - hydrochloric acid
sulfate - sulfuric acid
nitrates - nitric acid
add solid metal oxide/ metal hydroxide to acid
filter out excess metal to get salt solution
pure solid crystals - evaporate some of water and leave rest to evaporate slowly (crystallisation)