In the process of salting-in, protein solubility in a dilute salt solution is increased by adding more salt. Because the protein solubility depends on the total ion concentration as well as the ion charge, salts containing doubly charged ions are often more effective than those containing singly charged ions.
(a) How many grams of MgCl₂ must dissolve to equal the ion concentration of 12.4 g of NaCl?