Compute the osmotic pressure:

Problem:

What are the parameters on that osmotic pressure of a salt solution depends?

Compute the osmotic pressure of 1000 ppm calcium chlorideat 300 K?

Answer:

The osmotic pressure of a salt solution depends on its molar concentration (C), temperature (T), and the nature of the substance whether ionic or nonionic. If it is a strong electrolyte, the number of ions it dissociates into upon ionization per molecule (i) is also used in computing the osmotic pressure of the solution. If it is a weak electrolyte, the degree of dissociation is used to generate the osmotic pressure.

The molar concentration of 1000 ppm calcium chloride (C) = 9.01 × 10^-3 moles / litre

T = 300 K, i = 3, R = 0.082 litre atm/degree/mole.

.^..Osmotic pressure of 1000 ppm calcium chloride =

3 × 9.01 × 10^-3 × 0.082 × 300 = 0.665 atm.