1/3 NS prepared from 23.4% NS: How much mL of NS and SWI?

by Sherri
(Raleigh, NC USA)

A liter of 1/3 NS is to be prepared from 23.4% concentrated sodium chloride solution and sterile water for injection. How many mL of each are to be used?


My textbook says the answers are 333 mL of NaCl and 667 mL of water. The closest I came to was 359 and 641.They are both 26 digits away from 333 and667. How do I find this 26 ? I am trying to find out how they get their answers.

Comments for 1/3 NS prepared from 23.4% NS: How much mL of NS and SWI?

Average Rating starstarstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar
by: David

This is less complicated question than you think.

A liter of 1/3 NS is prepared from...

So first of all, you want 333mL of Normal Saline.

(A Liter = 1000 milliliters)

1/3 NS is 333mL.

Then the sterile water for injection (SWI) is the remaining 2/3 of the mixture
2/3=667mL.

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 Pharmacy Tech Math Questions.

Back to Home

[?]Subscribe To This Site
  • XML RSS
  • follow us in feedly
  • Add to My Yahoo!