Answer:
4) KNO₃ because is unsaturated.
Explanation:
The solubility of KCl in water at 20°C is 10.0g/100,0g and of KNO₃ is 30.0g/100.0g.
When you make a solution under these concentrations, the solutions will be saturated, higher concentrations gives heterogeneous solutions. Lowers concentrations gives homogeneous solutions.
As concentration of the solution made for the student is 20.0g / 100.0g:
If the solution is of KCl produce a heterogeneous solution because is oversaturated.
If the solution is of KNO₃ produce a homogenous solution because is unsaturated.
Thus, the solution is made of <em>4) KNO₃ because is unsaturated.</em>
