[Manuel]

Hello, everyone.

I need to prepare a solution and I don't know how exactly to proceed... I have a saturated solution in NaCl (S=360 g/L). The question is, can I still dissolve another more soluble salt (this would be MgCl₂·6H₂O; S=1670 g/L) or it won't admit it??

I'm sorry if my English isn't too well. I hope that I'm explaining my problem correctly.

Thank you very much!!

[mjc123]

If your solution is saturated with NaCl, then adding any more Cl^- will precipitate NaCl. This is called the common ion effect.

[Borek]

If you add hydrate, chances are you will actually dilute the original solution, shifting the equilibrium.

In general, the only sure way is to put both salts into water and see how much of each dissolves. In such concentrated solutions strange things are happening, and they are difficult to predict precisely.