Question

What is the balanced chemical equation for the reaction: Kl + Pb(NO₃)₂ → KNO₃ + PbI₂?

a) 2Kl + Pb(NO₃)₂ → 2KNO₃ + PbI₂
b) Kl + Pb(NO₃)₂ → KNO₃ + PbI₂
c) 2Kl + Pb(NO₃)₂ → KNO₃ + 2PbI
d) Kl + 2Pb(NO₃)₂ → KNO₃ + 2PbI₂

Answer 1

The balanced chemical equation is 2KI (aq) + Pb(NO3)2 (aq) → 2KNO3 (aq) + PbI2 (s), resulting in a yellow precipitate of PbI2 and soluble KNO3.

Step-by-step explanation:

The balanced chemical equation for the reaction between potassium iodide (KI) and lead(II) nitrate (Pb(NO3)2) is:

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

This reaction results in the formation of lead(II) iodide (PbI2), which is a brilliant yellow precipitate due to the strong attractive forces between Pb²⁺ and I⁻ ions. Potassium nitrate (KNO₃) is the other product of this reaction, and it remains soluble in the aqueous solution.