Question

a solution containing 4 gram of a non volatile organic solutes per 100 ml was found an osmotic pressure equal to 500 CM of Mercury at 27 degree centigrade. The molecular weight of the solute is​

Answer 1

Step-by-step explanation:

Given  

a solution containing 4 gram of a non volatile organic solutes per 100 ml was found an osmotic pressure equal to 500 CM  of Mercury at 27 degree centigrade. The molecular weight of the solute is​

Given weight of solute = 4 g

Volume = 100 ml = 100 / 1000 litre.

Osmotic pressure π = 500 cm of mercury

                                = 500 / 76 atmosphere

Temperature = 27 + 273 = 300 k

We know that

Osmotic pressure π v = n RT

   500 / 76 x 100 / 1000 = 4 / M x 0.082 x 300

  M = 7478.4 / 50

M = 149.7

Therefore molecular weight of solute is 149.7