Question

The synthetic permeable membrane used in Berkeley-Hartley method is:
A) Copper ferrocyanide
B) Copper ferricyanide
C) Potassium ferricyanide
D) Potassium ferrocyanide

Answer 1

Hint:Osmotic pressure is the minimum pressure that should be applied to a solution for forestall the internal progression of its unadulterated dissolvable across a semipermeable membrane. It is likewise characterized as the proportion of the inclination of a solution to take in an unadulterated dissolvable with osmosis. Potential osmotic pressure is the greatest osmotic pressure that could create a solution if it were isolated from its unadulterated dissolvable by a semipermeable layer.


Complete answer:
Berkeley-Hartley method:Principle:The guideline of Berkley Hartley's method is to apply outside pressure on the arrangement by applying weight on the cylinder, only adequate to forestall the osmosis of the dissolvable into it.
Method:The contraption consists of a permeable pot containing Copper-ferrocyanide kept on its divider. Copper-ferrocyanide goes about as a semipermeable film (SPM). It is fitted into a bronze chamber to which is fitted with a piston and a pressure gauze. The capacity of pressure gauze is to quantify the pressure. The permeable pot is fitted with a water store on one side and a slender cylinder on the opposite side.
Procedure:Water is kept in the permeable chamber while the bronze chamber is loaded up with the solution (whose osmotic pressure is to be estimated). Water set in the permeable chamber will in general pass into the solution through a semipermeable film then the level in the capillary cylinder moves descending, at that point outer pressure is applied to the cylinder so the water level in the capillary cylinder stays consistent. The reading of pressure gauze is recorded. This applied pressure is equivalent to the osmotic pressure.
So, the synthetic permeable membrane used in Berkeley-Hartley method is: Copper ferrocyanide.

So,the correct option is A.


Note:In this process you should remember the following things and they are very important for the calculation of osmotic pressure.The solute used in the solution must be non-volatile.That solution should be neutral in the solution that means it should not undergo dissociation or associationAnd most importantly we must use dilute solution and that also should not be greater than five percent.