00:01
Hi, so to solve for this, remember that the formula for molarity is the moles of solute over the volume of the solution.
00:12
And we are solving for the mass of calcium chloride.
00:15
Oh, this is volume of the solution in terms of liters.
00:18
Again, we're solving for the mass of calcium chloride.
00:20
If we are to make 0 .100 molar chloride and ion and then we have 125 volume of the solution.
00:28
So that means we could solve first for the number of moles of chloride and ion.
00:32
So the number of moles of cl - will just multiply molarity and the volume of the solution.
00:39
So that's 0 .100 molar.
00:41
We can write moles per liter.
00:44
And then multiply the volume which is 125 ml.
00:49
Now we have to convert ml to liters.
00:54
And this is the conversion factor.
00:56
1000 ml is 1 liter.
00:59
Now cancel ml and then liters.
01:03
And this will give us 0 .0125 moles of chloride ion.
01:11
Now to solve for the mass of calcium chloride, cacl2.
01:16
Let me just calculate the molar mass of cacl2 here...