Asked by rf
how many mls of pure water does a pharmacist have to add to 50mls of a 15% minoxide solution to get a 10% minoxide solution?
Answers
Answered by
Steve
The total solute must add up. Pure water is 0% solution:
w(0) + 50(.15) = (w+50)(.10)
7.5 = .10w + 5
.10w = 2.5
w = 25 ml
Just to check. We added 50% more volume. The volume is 3/2 what it was, so the concentration is 2/3 what it was.
w(0) + 50(.15) = (w+50)(.10)
7.5 = .10w + 5
.10w = 2.5
w = 25 ml
Just to check. We added 50% more volume. The volume is 3/2 what it was, so the concentration is 2/3 what it was.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.