Question

I am still confused!

Equation: C1V1=C2V2

Given:
C1= 15 mM
V1=?
C2= 0.25 mM
V2= 1mL (Do I just plug 1mL into the equation or do I have to convert to liter? Does mM mean mmol/1L?)

I got ~17 microliter. Note: I must convert my answer to microliter.


Math - bobpursley, Saturday, January 14, 2017 at 8:54pm
Nope.
V1=C2V2/C1
= .25MilliMoles/liter*.001Liter/.15millimoles/liter
= .25/.15 * .001L
= 17*.001L= 17 milliLiters
I don't have a clue why you are coming up with microliters. little m means milli

Math - bobpursley, Saturday, January 14, 2017 at 9:00pm
So if wou need to convert to microliters, it is 17,000


Thank you, bobpursely, but I am still confused because where did 0.15 come from in the above answer? I thought you just keep it as 15 mM,since you still keep the 0.25 mM.

So for the equation below I thought the answer would be...

0.25MilliMoles/liter*.001Liter/15millimoles/liter = 0.00001667 liter (after all the units are cancelled we are left with the unit liter) = 16.67 microliter

Does my work make sense?

Answer 1

your work looks okay

C1 is 60 times C2
... so V1 should be 1/60 of V2

Answer 2

Yes