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In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

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2KI (aq)+Pb(NO_3)_2(aq)
ightarrow PbI_2(s)+2KNO_3

Potassium Iodide(KI) and lead nitrate Pb(NO_3)_2  dissociate in their aqueous states to form ions.

Precipitates of lead iodide (PbI_2) are formed.

Lead sulphate being insoluble in water does not give Pb^2+ ions which can combine with I^-  to form (PbI_2)

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Deependra Verma

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