Multiple choice

Two solutions of glucose have osmotic pressures 1.5 and 2.5 atm. 1 litre of first solution is mixed with 2 litre of second solution. The osmotic pressure of the resultant solution will be:

  1. 1.62 atm

  2. 6.12 atm

  3. 1.26 atm

  4. 2.16 atm

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Osmotic pressure is a colligative property dependent on concentration. Using the formula (P1V1 + P2V2) / (V1 + V2) = P_resultant: (1.5 * 1 + 2.5 * 2) / (1 + 2) = (1.5 + 5) / 3 = 6.5 / 3 = 2.166... atm.

AI explanation

The osmotic pressure of a mixture is calculated as the weighted average of the individual osmotic pressures based on their volumes. Applying the formula gives (1 multiplied by 1.5 plus 2 multiplied by 2.5) divided by (1 plus 2), which equals 6.5 divided by 3. The final osmotic pressure is 2.16 atm.