Which colour fumes are obtained when lead nitrate is heated write the balanced chemical equation for this reaction?

Lead nitrate crystals on strong heating decompose to form a Lead mono oxide, Nitrogen dioxide gas, and Oxygen gas. Explain

Open in App

Suggest Corrections

Distribute the referral code to your friends and ask them to register with Tutorix using this referral code.

Once we get 15 subscriptions with your referral code, we will activate your 1 year subscription absolutely free.

Your subscribed friend will also get 1 month subscription absolutely free.

Answer

Verified

Hint: Chemical formula of lead nitrate is $Pb{(N{O_3})_2}$. To answer this question, refer to the decomposition reactions of metal nitrates. To balance a chemical equation of a reaction, count the total number of atoms of each element on both sides, that is, the reactant side and product side of the reaction and make them equal.

Complete step by step answer:

Given that lead nitrate, having chemical formula $Pb{(N{O_3})_2}$ is heated in a test tube. The two observations of this chemical reaction are:(i) When lead nitrate is heated, it decomposes into lead oxide ($PbO$), nitrogen dioxide ($N{O_2}$), and oxygen gas (${O_2}$). The type of this reaction is thermal decomposition reaction. (ii) The thermal decomposition reaction of lead nitrate to give lead oxide, nitrogen dioxide and oxygen, is represented with a balanced chemical equation as:$2Pb{(N{O_3})_2}(s)\xrightarrow{\Delta }2PbO(s) + 4N{O_2}(g) + {O_2}(g)$ Thus, this is the required answer.

Additional information:

Reddish brown fumes of nitrogen dioxide ($N{O_2}$) is formed on heating lead nitrate. Lead oxide (PbO) also produced, is a solid of buff yellow colour. Thus, the colour of residue obtained after thermal decomposition of lead nitrate is yellow. Lead nitrate is toxic, and its ingestion may lead to acute lead poisoning, and it is applicable for all soluble lead compounds.

Note: Lead nitrate is an inorganic compound and is nitrate salt of lead. Most nitrates tend to decompose on heating to give the metal oxide, brown fumes of nitrogen dioxide, and oxygen as products. But, most metal oxides decompose upon heating, to produce metal oxide and brown coloured nitrogen dioxide and oxygen. You must know that lead (IV) oxide is thermally unstable and it tends to decompose into lead (II) oxide and oxygen upon heating.