Write two observation when lead nitrated is heated in a test tube
Answers
Answer:
when lead nitrate pbno3 is heated there is evolution of so2 and so3 gas
and a white substance is formed
Answer:
When solid lead nitrate is heated strongly a it turns yellow due to formation of lead oxide and a reddish brown gas is evolved which is nitrogen dioxide.When the evolved gas is passed over wooden glowing splinters it rekindles.This shows the presence of oxygen.
Explanation:
Nitrate are normal salt of motivation nitric acid formed by replacement in the molecule of acid by a metal ion.
Lead is transition metal with valency +2.
So, to be stable like nearest noble gas it needs two electrons.
Nitrate is the negative radical with valence -1 .
When lead reacts with nitrate radical it forms lead nitrate. Since, the valency of lead is +2 it will need two nitrate radical.
Lead nitrate is formed by reacting lead with nitric acid, so by displacement reaction it forms, lead nitrate ,water and nitrigon di oxide.
When lead nitrate is heated, it due to thermal decomposition gives out metal oxide, oxygen and nitrogen dioxide.
Lead gives out a yellow buff coloured residue lead oxide with a reddish brown gas nitrogen dioxide.
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