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Bases (Catagories (basic oxide, basic hydroxide, ammonium hydroxide),…
Bases
Catagories
basic oxide
basic hydroxide
ammonium hydroxide
Preperation
From metals{
Metal+O2 = base
}
action
Of Water
On reactive metals{
Reactive metals + H2O = base/alkali + H2
}
On soluble metallic oxides{
Metal oxide + H2O = Base(Alkali)
}
Of O2
On metal Sulphides{
Metalic sulphide + O2 = Metalic oxide + Sulphur dioxide
}
decomposition
Double Decomposition{
salt Solution + Base(Alkali) = Basic Hydroxide + Normal Salt
}
Of salts
Carbonates{
Metal carbonate = Basic oxide + Carbon dioxide
}
nitrates{
Metal nitrate = Basic oxide + nitrogen dioxide +O2
}
Classification
on acidity
Triacidic
Diacidic
Monoacidic
On strength
Strong
Properties
Chemical
Reaction :explode:
with CO2 {
Strong alkali +Co2 = Carbonate +H2O
}
with acids {
Base/alkali +acid = Salt +H2O
with Sol. of salts of heavy metals
{
Metalic Salt + Base/alkali = salt +Insoluble Hydroxide
}
heating
with an ammonium salt
{
Ammonium salt + Alkali = Salt + water + Ammonia
}
Physical
Bitter taste
change in indicators
Color
odour
Soapy Substances
Strong electrolytes
Mild corrosive action