Magnesium carbonate, MgCO3, has a Ksp value of 6.80×10?6 . What happens when magnesium and carbonate solutions are mixed to give 2.50×10?3M Mg2+ and 2.00×10?3M CO3 2-? A precipitate forms because Q grater than Ksp A precipitate forms because Q less than Ksp No precipitate forms because Q grater than Ksp No precipitate forms because Q less than Ksp