Precipitation Question (1 Viewer)

[suling]

I keep coming across these sort of questions in past papers and have NO IDEA where to start. Any help would be much appreciated. =)

A chemical reaction between soluble potassium iodide and a solution of lead nitrate produces an insoluble lead salt as a precipitate. If 2.0 grams of the yellow lead salt precipitate was produced, what volume of 0.20 mol lead nitrate must have been used in the reaction, assuming all lead ions are precipitated?

 

[brenton1987]

A chemical reaction between soluble potassium iodide and a solution of lead nitrate produces an insoluble lead salt as a precipitate. If 2.0 grams of the yellow lead salt precipitate was produced, what volume of 0.20 mol lead nitrate must have been used in the reaction, assuming all lead ions are precipitated?

2 KI + Pb(NO₃)₂ --> 2 KNO₃ + PbI₂

PbI₂
m = 2.0 g
F = 461.009 g^.mol^-1
n = 4.3383*10^-3 mol

Pb(NO₃)₂
n = 4.3383*10^-3 mol
C = 0.20 mol^.L^-1
V = 0.0217 L