A white salt on heating decomposes to give brown fumes & a residue is left behind.rn
(i) Nmae the saltrn
(ii) Write the equation for the decomposition reaction.
The chemical name of white salt is Lead nitrate Pb(NO3)2.
On heating, the salt produces brown fumes. It implies that it contains nitrate ion. The salt can be possibly any nitrate but if the yellow residue left after heating implies the salt to be lead nitrate.
The equation involved can be shown as:
2Pb (NO3)2 → 2PbO + 4NO2 + O2
Colourless Yellow Brown fumes