Question about dilution

by Carolyn
(Illinois)

After adding 20ml of Sterile Water for Injection to a 4gm vial of powdered drug, the concentration is 325mg/2ml. What is the powder volume of the drug? {remember powder volume is equal to final volume-diluent added)

Comments for
Question about dilution

Click here to add your own comments

Nov 12, 2011
 Xaviers girl
by: Anonymous

first set up the problem....
325mg/2ml = 4g/xml
convert grams to milligrams
325mg/2ml= 4000mg/xml
Cross Multiply
325(X)= 2(4000)
325x=8000
325x/325=8000/325
x=24.61

solve for powder volume
24.61ml-20ml(inital volume)=4.61 ml
Jun 16, 2011
 Dilution
by: Anonymous

Convert : 4 gm of powder drug to mg, since you have concentration, you'll get final volume.

2ml/325mg x 4000mg = 24.6ml

24.6ml - 20ml = 4.6ml (powder volume)
May 28, 2011
 Can't sove this one either.
by: Anonymous

Please someone: What's the right way to do this one?

Click here to add your own comments

Join in and write your own page! It's easy to do. How?
Simply click here to return to Ask a Math Question






© 2009 - 2012 pharmacy-tech-study.com All rights reserved
All content is unofficial and for entertainment purposes only
privacy