Question

The molecular mass of NaCl as determined by osmotic pressure measurement is

• A. 58.5
• B. less than 58.5
• C. more than 58.5
• D. unpredictable

Answer 1

Answer: (B)

less than 58.5

Answer 2

NaCl undergoes dissociation in an aqueous solution. As such number of particles in solution increases, the magnitude of colligative property increases, molecular mass decreases.