00:01
Hi, so to solve for this, we will use the formula for osmotic pressure.
00:06
Osmotic pressure is equivalent to van't hoff factor multiplied by the molarity of the solution or the ideal gas constant and t, the temperature.
00:15
First, let's calculate first m.
00:17
Molarity is moles of solute over volume of solution in terms of liters.
00:25
So let's plug in the information that we have.
00:28
We have 8 .66 grams of magnesium chloride.
00:32
Convert this to moles by dividing the molar mass.
00:35
That's 95 .2 grams.
00:36
And then we have here moles over the volume.
00:40
We have 5 liters, so we could cancel grams.
00:44
And molarity of the solution is therefore equivalent to 0 .0182 moles per liter.
00:56
So let's plug in the information that we have.
00:59
Osmotic pressure will be equivalent to van't hoff factor for mgcl2.
01:04
This will dissociate into 3 ions, so this will be 3.
01:08
Molarity is 0 .0182 moles per liter...