00:01
To answer this question, we'll use the concentration of the stock solution.
00:05
You've given that as, we'll call it c1, 0 .00552.
00:16
We then use the dilution equation, c1v1 equals c2v2, to calculate the diluted concentration, c2.
00:26
C2 is going to be equal to c1v1 divided by v2.
00:35
So for trial number one, we take 2 .5 milliliters of the stock solution, at 0 .00, let's do this, c2 will be equal to 0 .00552, times 2 .5, divided by the total volume.
01:03
The total volume is 25, so it's not 25 plus 2 .5, it's just the total volume is 25, so that gives us, i wonder if they wanted you to do all the significant figures, because you've surely done the calculation correctly, 0 .00552 times 2 .5, divided by 25, gives us 0 .000552...