Question

Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.

Answer 1

On adding potassium iodide solution to lead nitrate solution, yellow precipitates of lead iodide are formed, and the colour of the solution changes from colourless to yellow. Hence, formation of a precipitate and a change in colour are the characteristics of this chemical reaction.

\[\ce{2KI_{(aq)} + Pb(NO3)2_{(aq)} -> PbI2_{(s)} + 2KNO3_{(aq)}}\]