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Chemical Properties

Which is the ...

Question

Which is the salt when heated releases brown fumes and write is reaction?

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Solution

The chemical name of white salt is Lead nitrate Pb(NO3)2.

The salt on heating produces brown fumes. This implies that the salt contains nitrate ion. This salt can be any nitrate but if the residue left after heating is yellow in colour implies that the salt is lead nitrate.

The equation involved can be shown as:

2Pb(NO3)2 → 2PbO + 4NO2 + O2

Lead nitrate Lead oxide Nitrogen dioxide

Colourless Yellow Brown fumes

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