posted by sarah .
A dilute aqueous solution of CaCl2 contains 0.159 grams of solute per liter of
solution. It is fully dissociated. What is the osmotic pressure of the solution
against a membrane at 20.0 °C?
pi = iMRT
i = 3 for CaCl2
moles = grams/molar mass CaCl2, then M = moles/L
R = 0.08206
T = 20 in kelvin.