Potassium iodide is added to a solution of lead nitrate....what are...?

Question

Potassium iodide is added to a solution of lead nitrate....what are...?

$A. The solid product of reaction?$ $"A. The solid product of reaction?"$
$B. The colour of this product?$ $"B. The colour of this product?"$
$C. A stoichiometric equation to represent the reaction?$ $"C. A stoichiometric equation to represent the reaction?"$
$D. Can the reaction be described as a solubility equilibrium?$ $"D. Can the reaction be described as a solubility equilibrium?"$

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Answer 1 · 2017-07-01T10:08:29

I presume you mean potassium iodide, $K I$ $KI$ .....is added to the aqueous lead salt.

Explanation:

$A .$ $A.$ $Lead iodide$ $"Lead iodide"$

$B .$ $B.$ $Lead iodide$ $"Lead iodide"$ gives a beautiful, bright yellow precipitate......

$C .$ $C.$ $P b {(N O_{3})}_{2} (a q) + 2 K I (a q) \to P b I_{2} (s) ⏐ ↓ + 2 K N O_{3} (a q)$ $Pb(NO_3)_2(aq) + 2KI(aq) rarr PbI_2(s)darr+ 2KNO_3(aq)$

The net ionic equation is........

$P b^{2 +} + 2 I^{-} \to P b I_{2} (s) ⏐ ↓$ $Pb^(2+) + 2I^(-) rarr PbI_2(s)darr$

$D .$ $D.$ This is a $solubility equilibrium$ $"solubility equilibrium"$ , where the salt $P b I_{2}$ $PbI_2$ is highly insoluble. I suppose you could also call it a $metathesis$ $"metathesis"$ or $partner exchange$ $"partner exchange"$ reaction........but I do not know what your syllabus specifies.....Experimentally, we KNOW that all halides are soluble, EXCEPT for those of $H g_{2}^{2 +}$ $Hg_2^(2+)$ , $P b^{2 +}$ $Pb^(2+)$ , and $A g^{+}$ $Ag^+$ . In the 1st year curriculum, this must simply be known.

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Potassium iodide is added to a solution of lead nitrate....what are...?

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