Question

The boiling temperature of a cobalt (II) chloride solution is 100.5 °C. Its density at 25 °C is 1.235g/cm³. Calculate the osmotic pressure of the solution at 25 °C. [Keb = 0.515]

A) 2.46 atm
B) 1.98 atm
C) 3.12 atm
D) 4.25 atm

Answer 1

The osmotic pressure of the solution at 25 °C can be calculated using the equation II = MRT, where M is the molarity of the solution, R is the ideal gas constant, and T is the temperature in Kelvin. The correct answer is A) 34 atm.

Step-by-step explanation:

To calculate the osmotic pressure of the solution at 25 °C, we can use the equation II = MRT, where M is the molarity of the solution, R is the ideal gas constant, and T is the temperature in Kelvin. In this case, the molarity of the solution is 1.4 M and the temperature is 298 K. Substituting these values into the equation, we get II = (1.4 mol/L) * [0.0821 (L· atm)/(K · mol)] * (298 K) = 34 atm. Therefore, the correct answer is A) 34 atm.