A solution is prepared by dissolving 0.60 g of nicotine (a nonelectrolyte)in water to make 12 mL of solution. The osmotic pressure of the solution is 7.55 atm at 25 °C. The molecular weight of nicotine is ________ g/mol.
A)28
B)43
C)50
D)160
E)0.60

Question

Quizplus · Accepted Answer

The osmotic pressure (π) can be calculated using the formula π = (n/V)RT, where n is the number of moles, V is the volume in liters, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin. Rearranging to find the molecular weight (MW), we have MW = (mass * R * T) / (π * V). Substituting the given values (mass = 0.60 g, T = 298 K, π = 7.55 atm, V = 0.012 L), we find MW ≈ 160 g/mol.

A Solution Is Prepared by Dissolving 0