The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
Solutions of lead(II) nitrate and potassium iodide were combined in a test tube. This is a double displacement reaction. The complete ionic equation is:
Pb²⁺(aq) + 2 NO₃⁻(aq) + 2 K⁺(aq) + 2 I⁻(aq) ⇒ 2 K⁺(aq) + 2 NO₃⁻(aq) + PbI₂(s)
Spectator ions are those that appear both in the reactants and in the products. They do not participate in the reaction, so they do not appear in the net ionic equation. The net ionic equation is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
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