00:01
Hi there.
00:02
This is a dilution problem.
00:04
We are starting with a stock solution and taking a small amount of that out and then adding it to some distilled water to make a diluted solution.
00:13
And we want to know its concentration.
00:16
So for a dilution problem, we can use the equation m1 v1 equals m2 v2, where m is the molarity of the stock solution and v1 is the volume of it.
00:30
M2 will be that new molarity.
00:33
And v2 is the total volume of the diluted solution.
00:37
So let's see what we have here.
00:39
We have a molarity of 12 molar in that stock solution and its volume is 25 milliliters.
00:48
We can leave volume in milliliters as long as the volume on the other side of this equation is also a milliliters, which it is.
00:56
So this will be equal to m2 times the new volume is going to be that 12 25 milliliters of the stock solution plus the 475 milliliters of the distilled water.
01:15
In other words, the total volume of this solution is going to be 500 milliliters...