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?
your work looks okay
C1 is 60 times C2
... so V1 should be 1/60 of V2
Yes
Your confusion is understandable. Let's break down the calculations step by step to clarify any confusion.
Given:
C1 = 15 mM
V1 = ?
C2 = 0.25 mM
V2 = 1 mL
The equation you stated is correct: C1V1 = C2V2
To find V1, we can rearrange the equation as follows:
V1 = (C2V2) / C1
Now let's substitute the given values into the equation:
V1 = (0.25 mM * 1 mL) / 15 mM
To ensure consistent units, we need to convert mL to L by dividing by 1000:
V1 = (0.25 mM * 0.001 L) / 15 mM
Now we can simplify the equation:
V1 = 0.00025 mol/L / 0.015 mol/L
Note that "mM" stands for millimoles per liter (mmol/L), so both numerator and denominator have the same unit of measure.
To solve the division, we divide the numerator by the denominator:
V1 = 0.0167 L
To convert this to microliters (µL), we multiply by 1000:
V1 = 16.7 µL (rounded to one decimal place)
Therefore, your final answer is 16.7 µL, not 16.67 µL. The difference in the decimal place might have caused some confusion.
I hope this clarifies your confusion.