# Pharmacy Tech

posted by .

Rx: Prostaglandin E 10mcg/mL
If the stock container of prostaglandin E is 100 mg/mL, how many 9-mL dilutions are required to prepare the ordered concentration?

• Pharmacy Tech -

You are diluting 100m/10mc times, or 100/.01 = 10000 times. I am not familiar with a procedure called 9 ml dilutions. IF YOU MEAN 9ml water to 1ml of stock, then to get 10,000 you need to do it..

first time: 10:1
second time: 100:1
third time:1000:1
fourth time:10 000 :1 you are done.

• Pharmacy Tech -

Same procedure as above, except first you need to convert the stock container of 100 mg/ml to the mcg/ml you need to satisfy the prescription. So to do that you do a ratio like that listed above, except you start off with 100,000 mcg (after converting 100 mg to micrograms). Then from there you do as follows:

100,000:1
10,000 :1
1,000 :1
100 :1

And there's your answer, it takes 4 times to get to the desired dilution.

## Similar Questions

1. ### Chemistry

1)Write the general equation used to determine the volume of stock required to make a given concentration of standard?
2. ### Chemistry

Phosphate standards used to generate the calibration curve are usually made by first preparing a stock solution of known concentration, then diluting it to the required concentration. First prepare a stock solution that is 1.00 x 10-2 …
3. ### Chemistry-dilutions

I have a 2000ppm benzoic acid solution.I want to prepare a 20ppm benzoic acid solution.Is it better to 1) do serial dilutions i.e. from 2000 to 200 to 20ppm or 2) prepare 20ppm standard fresh when required( take 10ul of 2000ppm stock …
4. ### chemistry

During lab, you are provided with a stock antibody solution (Ab) that has a concentration of 400 μg/μl. For lab, it is necessary make the following dilutions (Fill in the blanks): 5μL of Stock Ab + 195μL of buffer …
5. ### pharmacy tech.

Prepare 500ml of a 1:5 solution using a 1:10 solution and a 1:4 solution. What quantities will be used of each stock solution to make the 1:5 solution?
6. ### Chemistry!!

A chemist wants to prepare a stock solution of H2SO4 so that a sample of 20.00mL will produce a solution with a concentration of .50 M when added to 100.0mL of water. A)what should the molarity of the stock solution be?
7. ### chemistry

2. A researcher is often required to prepare solutions in the lab. Typically, a lab provides a concentrated solution. This solution must be diluted to the proper concentration. Hydrochloric acid is a common stock solution that is typically …
8. ### pharmacy tech

3. You receive an order for 30 mL of 3% boric acid solution. The pharmacy has in stock a 1% and 5% boric acid solution in stock
9. ### Chemistry

In the laboratory you will be provided with a 1.0 x 10-5 M primary stock solution of fluorescein (MW=332.31g/mol). The calibration curve should include a blank, 0.025, 0.05, 0.075, 0.10, 0.15, and 0.25 micromolar fluorescein solutions. …
10. ### Chemistry

In the laboratory you will be provided with a 1.0 x 10-5 M primary stock solution of fluorescein (MW=332.31g/mol). The calibration curve should include a blank, 0.025, 0.05, 0.075, 0.10, 0.15, and 0.25 micromolar fluorescein solutions. …

More Similar Questions