Final answer:
A 2.0 molal solution of NaCl has a particle concentration of 1.4 M. The osmotic pressure of the solution can be calculated using the formula II = MRT.
Step-by-step explanation:
A 2.0 molal solution of NaCl has a particle concentration of 1.4 M. This is because 1 mole of NaCl produces 2 moles of particles in solution. Therefore, the total concentration of dissolved particles in the solution is (2)(0.70 M) = 1.4 M.
The osmotic pressure of the solution can be calculated using the equation II = MRT, where II is the osmotic pressure, M is the molarity, R is the ideal gas constant, and T is the temperature. Substituting the values, II = (1.4 mol/L) [0.0821 (L·atm)/(K · mol)] (298 K) = 34 atm.