[boramhuh]

Both Mg2+ and Fe2+ react with Carbonate (CO3-)  and the Ksp for Mg2+ = 1 × 10-5
and the Kspp for Fe2+ =  2 × 10-11


1) What would happen if the Fe2+ is added to a solution of Mg(CO3)2?
2) What would happen if the Mg2+ is added to a solution of Fe(CO3)2?



My guess would be
1) Fe precipitate would form due to the lower Ksp value of Fe2+ ion.
Most of the Mg2+ ions would be soluble in CO3, but Iron, having the lower Ksp value, would need to form Fe precipitate

2) Both Mg and Fe precipitate would form?
This one I' not really sure...

Would you help me out guys?

Thank you in advance!

[Borek]

I guess question should read "added to saturated solution of". This would define concentration of carbonate ions.