How much of a 1:1000 stock is needed to make a 360ml of a 1:2400 solution?

by Georgette
(Charleston, SC, USA)

Pharmacy Ratio / Dilution Question

Pharmacy Ratio / Dilution Question

How much of a 1:1000 stock is needed to make 360 ml of a 1:2400 solution?
Also, how much water is required?

Comments for How much of a 1:1000 stock is needed to make a 360ml of a 1:2400 solution?

Average Rating starstarstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar

by: Anton

So, we are given "1:1000" stock.

This is equivalent to 1/1000.

We want to follow the following equation to solve this question:

Amount of strength req'd
Stock Req'd = -------------- X Volume Req'd
stock req'd

So, we plug in the variables to see what we come up with:

1/2400
------ X 360ml = Amount of Stock Req'd
1/1
1/2400
0.15ml = -------- X 360ml
1/1

The final equation we use in this question is the following:

Water Req'd = Volume req'd X Stock Req'd

360ml X 1.5ml = Water Req'd

54ml = Water Required

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!