7g of NaOH is dissolved in .5L of water and placed on one side of a semipermeable membrane. Pure water is on the other side of the membrane, which is permeable to water but not to NaOH. Which direction will the water flow? If all of the water is at a temperature of 10¬°C, what is the initial osmotic pressure ?
The water flows from the side of lower solute concentration to the side of higher solute concentration. In this case, the water flows from the side without the NaOH to the side with the NaOH. To find the osmotic pressure, the molarity of the solution must first be calculated:
Substituting this value into equation (1) then yields the osmotic pressure.
