Chemical Equation:
2Pb(NO₃)₂ (s) → 2PbO (s) + 4NO₂ (g) + O₂ (g)
Explanation:
* Decomposition: Lead nitrate (Pb(NO₃)₂) breaks down into simpler substances.
* Lead(II) Oxide (PbO): A yellow solid residue is formed.
* Nitrogen Dioxide (NO₂): A reddish-brown gas is released, which is toxic.
* Oxygen (O₂): A colorless gas is also released.
Observations:
* The crystals will melt and then decompose.
* The mixture will turn yellowish-brown due to the formation of PbO and NO₂.
* Reddish-brown fumes will be visible as NO₂ gas is released.
Safety Precautions:
* This reaction should be carried out in a well-ventilated area due to the toxic nature of NO₂ gas.
* Avoid inhaling the fumes.
* Wear appropriate safety gear, such as gloves and goggles.
Important Note:
Lead compounds are toxic. This reaction should be performed with proper safety precautions and under the supervision of a qualified instructor.
