00:01
So this problem is playing on malarity and dilutions.
00:03
So we need to know that the concentration for molarity equals the moles divided by the liters.
00:10
We also need to know that m1v1 equals m2, sorry, m2 v2.
00:17
We also need to know that 1 ,000 milliliters equals 1 liter.
00:22
So we can either move the decimal place 3 to the left or we can divide by 1 ,000.
00:28
So it asks us for the initial.
00:30
Second solution and the final solution.
00:32
Well, we know the initial solution has molarity of 1 .40 molar because it told us that.
00:39
So then we know for the first, or for solution two, sorry, for solution two, we have the 1 .40 molar.
00:53
We know we add 0 .059 liters.
00:58
And this equals 0 .238.
01:03
Liters times the molarity.
01:06
So to solve for the molarity, we're going to divide both sides by 0 .238...