# Chemistry Class 12 NCERT Solutions: Chapter 2 Solutions Part 17

Q: 40: Determine the amount of dissolved in litre of water such that its osmotic pressure is .

We know that,

Here,

Therefore, w

Hence, the required amount of is

Q: 41. Determine the osmotic pressure of a solution prepared by dissolving of in 2 liter of water at , assuming that it is completely dissociated.