Question

What is the concentration of a solution, in gsolute/100gsolvent, made using 2.83 g of KNO3 in 2.03 g of H2O? Do not include units in your answer.

Answer 1

139.4 % by solvent

Step-by-step 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