C) A yellow precipitate settles to the bottom.
Explanation:
Lead nitrate is reacting with potassium iodide to form lead iodide, which is a yellow precipitate, and potassium nitrate.
Pb(NO₃)₂ (aq) + KI (aq) → PbI₂ (s) + KNO₃ (aq)
where:
(aq) - aqueous
(s) - solid
A) The solution is yellow.
False, the solution is colorless while the PbI₂ precipitate is yellow.
B) Both reactants are aqueous solutions.
True, however this is not a proof that the chemical reaction occurred.
C) A yellow precipitate settles to the bottom.
True and this is a proof that the chemical reaction occurred because of the formation of PbI₂ yellow precipitate.
D) Lead and potassium are both metals and will replace each other.
True, but this is not a proof that the chemical reaction occurred.
Learn more about:
types of chemical reactions
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