pharmacy tech question

by Rhatigan
(Rochester, N.Y.)

What is the percentage strength of a solution that is made by adding 200ml of water to 60ml of a 25% solution?

Comments for
pharmacy tech question

Aug 06, 2011

5.77%
by: Van

THE LAST VOLUME IS 26OML
USING C1V1=C2V2
C2=(60*25)/260=5.77%

Mar 27, 2011

v/v calculation
by: Anonymous

I followed the formula for v/v problems in my pharmacy technician text book. The formula is follows:

active ingredient divided by the total ingredient, which is the total of the active and base. In this problem the total ingredient is 260, so the equation would be:

200/60 = 3.33%

Would someone please confirm this or let know what the solution would be?

Oct 15, 2010

I believe the answer is:
by: Siopao

What is the percentage strength of a solution that is made by adding 200ml of water to 60ml of a 25% solution?

Ans. 60ml = 25%
200ml + 60ml = ?%

(60ml)(.25) = (260ml)x
15 = 260x
x = .0576 x 100

Ans = 5.77%

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