Which, if any of the following correctly shows the balanced molecular equation for the reaction that occurs when aqueous solutions of potassium iodide and lead(II) nitrate are combined. A)2KI(aq) + Pb(NO₃)₂(aq) $\rarr$ PbI₂(s) + KNO₃(aq) B)KI(aq) + Pb(NO₃)₂(aq) $\rarr$ PbI₂(s) + 2KNO₃(aq) C)2KI(aq) + Pb(NO₃)₂(aq) $\rarr$ PbI₂(s) + 2KNO₃(aq) D)2KI(aq) + 2Pb(NO₃)₂(aq) $\rarr$ PbI₂(s) + 2KNO₃(aq) E) None of the above

Question

Quizplus · Accepted Answer

The balanced molecular equation for the reaction between potassium iodide and lead(II) nitrate can be written as follows:
2KI(aq) + Pb(NO3)2(aq) → PbI2(s) + 2KNO3(aq)
This equation shows that two moles of potassium iodide (2KI) react with one mole of lead(II) nitrate (Pb(NO3)2) to form one mole of lead(II) iodide (PbI2) and two moles of potassium nitrate (2KNO3).
Choice C is the only option that correctly shows the reactants and the products with the correct coefficients.

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