Question

When a solution of potassium iodide is added to a solution of lead nitrate in a test tube a

reaction takes place.


a) Determine the type of reaction mentioned above.


b) Write a balanced chemical equation for this reaction.

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Answer 1

Answer:

In a double displacement reaction, two compounds exchange their parts to form two new compounds. The reaction takes place between lead (II) nitrate and potassium iodide, the lead and potassium exchange their anions to give lead iodide and potassium nitrate. So, this is a double displacement reaction.

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.

• Balanced Equation: Pb(NO3)2 + 2KI --- 2KNO3 + PbI2 Word Equation: lead nitrate + Potassium Iodide ---- Potassium Nitrate + Lead Iodide.