Solutions — Chemistry STD 12 Science — Question

1. Define the following terms:

1. Mole fraction.
2. Van’t Hoff factor.

2. 100 mg of a protein is dissolved in enough water to make 10.0 mL of a solution. If this solution has an osmotic pressure of 13.3 mm Hg at 25° C, what is the molar mass of protein?

(R = 0.0821 L atm mol^–1 K^–1 and 760 mm Hg = 1 atm.)