How do we represent the reaction of potassium iodide with lead nitrate in aqueous solution?

1 Answer
Mar 7, 2017

Answer:

This is a #"metathesis"#, partner exchange reaction, that results in the formation of an INSOLUBLE precipitate.

Explanation:

And how to find the physical state BUT by experiment?

#Pb(NO_3)_2(aq) + 2KI(aq) rarr PbI_2(s)darr + 2KNO_3(aq)#

Perform the reaction and you observe a canary yellow precipitate of lead iodide, which is quite insoluble in aqueous solution.

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The net ionic equation is:

#Pb^(2+) + 2I^(-) rarr PbI_2(s)darr #

This is a good qualitative test for the presence of iodide ions.