Question

Q3. What is observed when a solution of potassium iodide is added to a solution of lead nitrate?Write a balanced chemical equation to represent the above chemical reaction.

Answer 1

Observation : KNO3 along with a yellow precipitate of PbI2 is formed.

Balanced equation :
Pb(NO3)2 + 2KI ---------> 2KNO3 + PbI2

Answer 2

Answer:

◆ When a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube, the precipitation of a yellowish solid is observed. This yellowish solid is lead iodide. Potassium nitrate is formed along with lead iodide.

◆ This is a double displacement reaction.

◆ When the two ionic compounds / elements exchange their ions is called Double Displacement Reaction.

◆ The balanced chemical equation for the above reaction is:

Balanced Equation: Pb(NO3)2 + 2KI --- 2KNO3 + PbI2

Word Equation: lead nitrate + Potassium Iodide ---- Potassium Nitrate + Lead Iodide.