Question

Equation when lead nitrate crystals are heated in hard glass test tube

Answer 1

$\huge {ANSWER}$

◼Lead nitrate $Pb(NO_3)_2$is prepared by dissolving lead ( II ) oxide in nitric acid.

◼It can also be prepared by dissolving mettalic ion in aqeous nitric acid.

$\bold{EQUATION}$

✳$PbO + 2 HNO_3 \longrightarrow Pb(NO_3)_2 + 2NO_2 + 2H_2O$

✳$Pb+ 4HNO_3 \longrightarrow Pb(NO_3)_2 + H_2O$

◼Nitrates are normal salts of monobasic nitric acid formed by replacement of hydrogen atom in a molecule in the molecule of the acid by a metallic ion.

⚫${When \: white \: lead \: nitrate \: is \: heated }$

◼Take a test tube and add lead nitrate with nitric acid.

✳OBSERVATION

On heating lead nitrate reddish brown evolved and a buff mass is left in the test tube.

✳EQUATION

$2 Pb(NO_3)_2 \longrightarrow 2Pbo + O_2 + 4NO_2$

Answer 2

Pb(NO3)2-----------> PbO +          NO2 +               O2

{lead nitrate}                      {brown fumes}