Question

What is the osmolarity (mOsm/L) and osmotic pressure (in kPa) of a 2.05 % w/v solution of Na2SO4. (The van’t Hoff factor for Na2SO4 at this concentration is 2.26).

I assume I should use the osmotic pressure equation. Pi = MRT to calculate the Osmotic pressure (Pi) but I dont know what value to use for T and M? Can I just use 0.0205 for M?

Edit: No Temp values are given in the question. I would assume temp to be normal lab temp of 25 celsius. Its a first year chem course so generally the lecturers are quite lazy.

Answer 1