In the double displacement reaction between aqueous potassium iodide

Explanation:

2KI(aq) + Pb(NO₃ )₂(aq)→Pb_I2(s) + 2KNO₃

• Lead acetate  reacts with potassium iodide dissolved in water to give acetate ion and lead ion
• The lead ion combines with the iodine ion and form lead iodide
• Potassium ion combines with acetate ion and forms potassium acetate. 

2KI(aq)+Pb(CH₃COO)₂ (aq)→PbI₂ (s) + 2CH₃COOK

 Hence , lead acetate can be used in place of lead nitrate .