Which of the following represents the correct products of the reaction: Pb(NO3)2 (aq) + 2 KCl (aq) → ?

• A. PbK2 (aq) + 2 NO3Cl (aq)
• B. PbCl2 (s) + 2 KNO3 (aq)
• C. Pb(NO3)2 (aq) + 2 KCl (aq)
• D. PbCl2 (aq) + 2 KNO3 (s)

Answer: (B)

Verified step by step guidance

1. Identify the type of reaction: This is a double displacement (metathesis) reaction where the cations and anions of the reactants exchange partners.
2. Write the reactants with their ions: Pb(NO3)2 dissociates into Pb^{2+} and 2 NO3^{-}, and KCl dissociates into K^{+} and Cl^{-}.
3. Exchange the ions to form the products: Pb^{2+} will pair with Cl^{-} to form PbCl2, and K^{+} will pair with NO3^{-} to form KNO3.
4. Determine the physical states of the products: PbCl2 is insoluble in water and will precipitate as a solid (s), while KNO3 is soluble and remains aqueous (aq).
5. Write the balanced chemical equation with correct formulas and states: Pb(NO3)2 (aq) + 2 KCl (aq) → PbCl2 (s) + 2 KNO3 (aq).