Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow. Pb ( N O ₃ ) ₂ (aq) + 2 K I (aq) → Pb I ₂ + 2 K N O ₃ ☐⁴⁻ ☐³⁻ ☐²⁻ ☐⁻ ☐⁺ ☐²⁺ ☐³⁺ ☐⁴⁺ 1 2 3 4 5 6 7 8 9 0 ☐₁ ☐₂ ☐₃ ☐₄ ☐₅ ☐₆ ☐₇ ☐₈ ☐₉ ☐₀ + ( ) → ⇌ (s) (l) (g) (aq) NR O K I N Pb Reset

Explanation:

The reaction is given as;

Pb ( N O ₃ ) ₂ (aq) +  K I (aq) → Pb I ₂ +  K N O ₃

To ensure the reaction is balanced, there has to be equal number of toms of each element present in both the reactant and product side of the reaction.

This leads us to;

Pb ( N O ₃ ) ₂ (aq) + 2 K I (aq) → Pb I ₂(s) + 2 K N O ₃(aq)

Ths way all atoms of elements are the same.