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ACIDS AND BASES NEUTRALISE
EACHOTHER
Acid ­ substance with ph less than 7. form h+ ions
in water
Base- substance with ph greater than 7 e.g. Metal
oxides and hydroxides
Alkali ­ base dissolved in water. Alkalis form OH-
ions in water
ACID+BASE = SALT + WATER
WHEN NEUTRALISATION HAPPENS-
PRODUCTS ALWAYS NEUTRAL
In neutralisation hydrogen ions react with hydroxide
ions to produce water.…read more

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EXAMPLES OF
NEUTRALISATION
Indigestion caused by too much hydrochloric
acid in stomach. Indigestion tablet contain
bases e.g. MgO, neutralises excess HCl
Lakes affected by acid rain can be neutralised
by adding lime. Saves fish
Field with acidic soils can be improved by
adding lime. Calcium hydroxide added - alkali…read more

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ACIDS AND METALS
ACID + METAL = SALT + HYDROGEN
name of salt depends on which metal and acid
used.
HYDROCHLORIC ACID- CHLORIDE SALTS
SULFURIC ACID- SULFATE SALTS
NITRIC ACID- NITRATE SALTS BUT CAN
PRODUCE NITROGEN OXIDES INSTEAD…read more

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OXIDES AND HYDROXIDES
Some metal oxides and metal hydroxides
dissolve in water. These soluble compounds
are ALKALIS
Even bases that wont dissolve in water will still
react with acids
All metal oxides and metal hydroxides react
with acids to form SALT + WATER.…read more

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AMMONIA
Ammonia dissolved in water = alkaline
solution
Ammonia + nitric acid= neutral salt
(ammonium nitrate)
USES:
Good fertiliser
Nitrogen from 2 sources- kind of double dose
Plants need nitrogen to make proteins…read more

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