metal oxide hydroxide

bases

reacts with acid → forms salt + water

metal oxides

oxide ion in the metal oxide

can accept protons and neutralise acids.

calcium oxide

neutralise sulfuric acid

to form calcium sulfate

whats calcium oxide used in

agriculture to neutralise acidic soil

if the ph of soil is low the plant will absorb toxic ions that affect root growth

metal hydroxide

they form hydroxides when they react with water

hydroxide ions can accept protons and neutalise acids

magnesium hydroxide

its used as an antacid to relive symptoms of indigestion and heart burn by neutralising hydrochloric acid thats entered the oesophagus

calcium hydroxide

neutralise acidic rffluent in chmical industry.

amphoteric oxides what do they behave as

they can behave as acids or bases

aluminium oxide

it wont dissolve in water but it will react will react with acids to form a salt and water.

it will also react with bases to form aluminates

whats alumina

its a form of aluminium oxide found in mineral bauxite, its extracted and purified using payer process.

bayer process stages

1. crush bauxite

2. react with NaOH(aq) at 170 degrees to form NaAl(OH)4(aq)

3. filter out solid impurities

4. allow to crystallise to form Al(OH)3

5. heat in rotary klin to form Al2O3