Question

what will happen when lead nitrate is heated in dry testtube? write the products formed. write equation also

Answer 1

Lead nitrate on heating decomposes to lead monoxide, nitrogen dioxide and oxygen.

2Pb(NO3)2 = 2PbO + 4NO2 + O2.

NO2 is liberated, along with oxygen, as a reddish brown gas. The residue left is lead monoxide.

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.

Hence the Chemical equation for above reaction is-

2Pb(NO3)2→2PbO+4NO2+O2