Which solution, if either, would create the higher osmotic pressure (compared to pure water): one prepared from 1.0 g of NaCl in 10 mL of water or 1.0 g of CsBr in 10 mL of water?
A)They would have the same osmotic pressures.
B)NaCl would give the higher pressure.
C)CsBr would give the higher pressure.
D)It is impossible to tell.
E)These compounds are salts and do not produce an osmotic pressure.

Question

Quizplus · Accepted Answer

NaCl will create a higher osmotic pressure than CsBr because NaCl will dissociate into two parts (Na+ and Cl-) while CsBr will only dissociate into one part (Cs+ and Br-). The more particles that are present, the higher the osmotic pressure. Therefore, the solution prepared from NaCl will have a higher osmotic pressure than the solution prepared from CsBr.

Which Solution, If Either, Would Create the Higher Osmotic Pressure