Question

Which of the following aqueous solution will have the highest osmotic pressure?

• A. $0.011$M $AlC{l}_3$ at ${50}^o$C
• B. $0.03$M NaCl at ${25}^o$C
• C. $0.012$M $(N{H}_4{)}_{2}S{O}_4$ at ${25}^o$C
• D. $0.03$M NaCl to ${50}^o$C

Answer 1

The correct option is A $0.011$M $AlC{l}_3$ at ${50}^o$C

By using the formula π=iCRT

Where, π is osmotic pressure

i is van't hoff factor

R is universal gas constant

T is temperature of solution

We can see that osmotic pressure is directly proportional to Van't hoff factor. So AlCl3 will exert highest osmotic pressure as its Van't hoff factor is maximum.

So the correct option is " 0.011M AlCl3 at 50°C".