Question

1. in the double replacement reaction between aqueous lead(ll) nitrate and potassium iodide, a precipitate forms.

a precipitate is an insoluble, solid product that forms in the double replacement reaction.
observe the reaction in the interactive video.
identify the color of the precipitate in the reaction.
green yellow
blue red
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Explanation:

In the double - replacement reaction between lead(II) nitrate ($\ce{Pb(NO_3)_2}$) and potassium iodide ($\ce{KI}$), the reaction is $\ce{Pb(NO_3)_2(aq) + 2KI(aq)\xlongequal{}PbI_2(s) + 2KNO_3(aq)}$. The precipitate formed is lead(II) iodide ($\ce{PbI_2}$), and lead(II) iodide is a yellow - colored solid.

Answer:

Yellow