EVILNess needs algebra help hopefully for the last time

[Toastburner B]

I did that wrong. The formula I was using was for dilutions, not mixing of two solutions. Sorry, my bad.

I can help with question one, I think.

I had to do similar problems with my studies. My teacher taught us a very simple formula for it:

Concentration1 X Volume 1 = Concentration 2 X Volume 2 (C1XV1 = C2XV2)

So, in the case of this problem you know the concentration and volume you have for one, but only the concentration for the other, so

EDIT: I plugged in the wrong numbers. See my next post for the right numbers.

9 X V1 = 60 X 7

Simplified down to

9(V1) = 420

Just solve for V1:

V1 = 420/9

V1 = 42.67 mL

Just round it out to what decimal place you need.

[TDK]

Originally Posted by Toastburner B

I did that wrong. The formula I was using was for dilutions, not mixing of two solutions. Sorry, my bad.

If you do the problem in terms of the 2% solution, it would be a dilution problem. :I

[Eltargrim]

Originally Posted by TDK

If you do the problem in terms of the 2% solution, it would be a dilution problem. :I

Not of the kind that his formula would work for :P

And Smarty, someone needs to teach the undergrads how to do it. Once.