## 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 26OMLUSING C1V1=C2V2C2=(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)x15 = 260xx = .0576 x 100Ans = 5.77%

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