Answer to Question #202439 in General Chemistry for Elisa Giuliani

Question

 

•  Answers to the calculations (showing full solutions)

The reaction between lead nitrate and potassium iodide is an example of a precipitation reaction.

Pb(NO3)2 + 2KI + PbI2 + 2KNO3

 

Let us consider an unbalanced equation

Pb(NO3)2 + KI → PbI2 + KNO3

 

Answer 1

solution

Pb(NO3)2 + KI → PbI2 + KNO3

Pb²⁺NO₃^-_(aq)+K⁺I^-_(aq)→ PbI_2(s)+2KNO_3(aq)

Pb²_(aq)⁺+2KNO_3(aq)+2K_(aq)⁺+2I_(aq)^-→PbI_2(s)+2K⁺_(aq)+2NO₃^-_(aq)

cancel out similar ions on both sides

final ionic net equation is as follows

Pb²⁺_(aq)⁺2I^-_(aq)→PbI_2(S)