Question

A colourless lead salt, when heated, produces a yellow residue and brown fumes.

1. Name the lead salt.
2. Name the brown fumes.
3. Write a chemical equation of the reaction involved.

Answer 1

1. Lead (II) nitrate (PbNO₃)₂
2. Nitrogen dioxide (NO₂)
3. \[\ce{2Pb(NO3)2_{(s)} ->[Heat] 2PbO_{(s)} + 4NO2_{(g)} + O2_{(g)}}\]