Part a
a solution of na2co3 is added dropwise to a solution that contains 1.12×10−2 m fe2+ and 1.51×10−2 m cd2+. what concentration of co32− is need to initiate precipitation? neglect any volume changes during the addition. express the molar concentration numerically.
[co32−] = 1.19×10−12 m; this is the answer that i got for part a
part b
in the solution from part a, what will the concentration of co32− be when fe2+ begins to precipitate? express the molar concentration numerically.