Answer:
139.4 % by solvent
Explanation:
Solute = KNO₃
Solvent = H₂O
So to get a concentration of g solute / 100 g of solvent, we can make a rule of three:
A mass of 2.03 in solvent has 2.83 of KNO₃
A mass of 100 in solution would has (100 . 2.83)/2.03 = 139.4
We can also calculate it, like this
(Mass of solute / Mass of solvent) . 100 =
(2.83 / 2.03) . 100 = 139.4
