Posted by **kate** on Wednesday, July 9, 2014 at 11:29pm.

a drug is supplied as a 20 mg/ml solution in a 50 ml vial. you need to make 15 ml of a 10 mg/ml solution. how much concentrate and how much diluent are needed to obtain the desired final volume?

- math -
**Steve**, Wednesday, July 9, 2014 at 11:58pm
you need x ml of solution, and 15-x ml of water (0 mg/ml), so

20x + 0 = 10*15

x = 7.5

Since the concentration is being reduced by a factor of 2, the volume needs to be increased by that factor.

2 * 7.5 = 15

## Answer this Question

## Related Questions

- math - A patient needs 45% dextrose 100ml The pharmacy has only 70% dextrose ...
- Chem - I need help please! You have been given 40ml of a 0.6M solution of NaCl ...
- steve for your solution - you need to use 3 solutions of drug H containing ...
- math Steve for your solution - 0.224g sample that contained only bacl2 and kbr ...
- chemistry - Need help stepping through this for a review. I need to prepare ...
- chemistry - A student needed to make 200 ml of 0.1 M naOH. If the stock soluton ...
- math - A solution contains 100 mg/mL of a drug and the recommended dose is 50 mg...
- math - A solution contains 100 mg/mL of a drug, and the recommended dose is 50 ...
- Math - If a mixture of a 6% acid solution with an 11% solution is to be made, ...
- Thermodynamics - Streptomycin, an antibiotic, is produced on a large scale in ...

More Related Questions