Question

What do you observed when lead nitrate is heated?

Answer 1

• When lead nitrate [Pb(NO)₃} is heated, firstly crystal melts giving out nitrogen dioxide (NO₂) a reddish-brown coloured gas and a yellow solid of lead oxide (PbO) are left behind in the test tube.

$$\begin{gathered} 2\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{s}\right)\stackrel{∆}{\to }2\mathrm{PbO}\left(\mathrm{s}\right)+4{\mathrm{NO}}_2\left(\mathrm{g}\right)\uparrow +{\mathrm{O}}_2\left(\mathrm{g}\right)\uparrow \\ \mathrm{lead}\mathrm{nitrate}\mathrm{lead}\mathrm{oxide}\mathrm{nitrogen}\mathrm{dioxide}\mathrm{oxygen} \\ (\mathrm{yellow}\mathrm{solid})(\mathrm{Reddish}\mathrm{brown}) \end{gathered}$$