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 acetatec)Ammonium nitrated)Potassium sulphateCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Lead acetate is a colourless compound.On coming in contact with potassium iodide crystal, the formation of lead iodide occurs that is bright yellow in colour. Also, since lead has high mass, therefore the precipitate formed, settles down because of its heaviness.

It is a double diplacement reaction.

Formula:

(Pb(CH3COO)2) + 2KI PbI2 +

2K(CH3COO)

Answer

Lead acetate will be used in place of lead nitrate. Pb(NO3)2 = Lead nitratePb(C2H3O2)2 = Lead acetate.hope you like it

Answer

B

Answer

Explanation:

In the double displacement reaction between aqueous potassium iodide (KI) and aqueous lead nitrate (Pb(NO3)2), a yellow precipitate of lead iodide (PbI2) is formed. The reaction can be represented by the following equation:

2KI(aq) + Pb(NO3)2(aq) → 2KNO3(aq) + PbI2(s)

If lead nitrate is not available, we need to find a suitable replacement that will react with potassium iodide to form lead iodide.

Possible Options:

a) Lead sulphate (insoluble): Lead sulphate (PbSO4) is insoluble in water and will not react with potassium iodide. Therefore, it cannot be used as a replacement for lead nitrate.

b) Lead acetate: Lead acetate (Pb(C2H3O2)2) is soluble in water and will react with potassium iodide to form lead iodide. Therefore, it can be used as a suitable replacement for lead nitrate.

c) Ammonium nitrate: Ammonium nitrate (NH4NO3) is soluble in water and will not react with potassium iodide. Therefore, it cannot be used as a replacement for lead nitrate.

d) Potassium sulphate: Potassium sulphate (K2SO4) is soluble in water and will not react with potassium iodide. Therefore, it cannot be used as a replacement for lead nitrate.

Conclusion:

Based on the options provided, lead acetate (option B) is the only suitable replacement for lead nitrate in the double displacement reaction with potassium iodide.

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