# (I) What is Observed When a Solution of Potassium Iodide is Added to a Solution of Lead Nitrate Taken in a Test Tube?(Ii) What Type of Reaction is This?(Iii) Write a Balanced Chemical Equation to - Science

(i) What is observed when a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube?
(ii) What type of reaction is this?
(iii) Write a balanced chemical equation to represent the above reaction.

#### Solution

i) 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.

(ii) This is a double displacement reaction.

(iii) The balanced chemical equation for the above reaction is:
2KI(aq)       +   Pb(NO3)2(aq)  —→   2KNO3(aq)  +   PbI2(s)
iodide             nitrate                     nitrate            iodide

Concept: Types of Chemical Change or Chemical Reaction - Double Displacement Reaction
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