× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
Home Q & A Board Laboratory Help Introductory Courses
New Topic  
oldcollegelady oldcollegelady
wrote...
Posts: 39
Rep: 3 0
13 years ago
Hello,
The question is calculate the amount of stock solution you need to make 5 mL of a 0.1mM solution from a 1.0 M stock, using the formula of C1 x V1 = C2 x V2. I know I should first change the 1.0 M to 1000.0 mM and the c stands for concentration and the v stands for volume. Which would be the C1, the V1, C2 and V2.  I always get confused with that part. Would the 5mL be the V2 ? thanks
Read 11660 times
3 Replies

Related Topics

Replies
wrote...
#1
Educator
13 years ago
Hey oldcollegelady, welcome back!

5 mL is your final volume (V2)
0.1 mM is your final concentration (C2)
1.0 M is your initial concentration (C1)

You need to find V1. You can either change 0.1 mM to M ... or ... 1.0 M to mM. We know that 1.0 M is 1000 mM, so:

(V1)(1000 mM) = (5 mL)(0.1 mM)

V1 = 0.0005 mL
wrote...
#2
13 years ago
great, thanks
wrote...
#3
Educator
13 years ago
Glad I can be a help to you!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1258 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 628
  
 300
  
 202
Your Opinion
Previous poll results: How often do you eat-out per week?