pi = osmotic pressure in atm = i*M*RT
You know pi in atm.
i = van't Hoff factor which is 2 for NaCl
R = 0.08205 = universal gas constant
T = kelvin temperature
Solve for M = molarity
Then M = mols/L.You have L, solve for mols and mols = g/molar mass NaCl.solve for g NaCl. Post your work if you get stuck.
What is the mass of NaCl required to make 840. mL of solution having an osmotic pressure of 7.70 atm at 36.6°C? This is the approximate concentration of the saline solution used to rinse contact lenses.
1 answer
1 answer