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?
(a)Lead sulphate (insoluble) (b)Lead acetate
(c)Ammonium nitrate (d)Potassium sulphate
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Correct Answer: (b) Lead acetate

Explanation: Lead acetate can be used in place of lead nitrate because it is also a soluble salt in water and gives the same product lead iodide (PbI₂) as lead nitrate.

$2KI (aq) + Pb(CH_3COO)_2 (aq) → PbI_2(s) + 2CH_3COOK$

Lead sulphate is insoluble in water, so it cannot be used. Potassium sulphate and ammonium nitrate will give entirely different products.

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Updated on: 10-Oct-2022

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(a)Lead sulphate (insoluble)	(b)Lead acetate
(c)Ammonium nitrate	(d)Potassium sulphate