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Homework Help: Pure pharmacy math

Posted by Fai on Tuesday, July 31, 2012 at 11:21pm.

How many ml of terpin hydrate elixirs containing 33mg/5ml and 5mg/5ml needed to prepare 6 fl oz of an elixir containing 4mg terpin hydrate per ml?
My calculation: 33mg/5ml = x/100ml - 660mg changes 0.66gm
5mg/5ml = x/100ml - 100mg - 0.1gm
4mg/1ml = x/100ml - 400mg - 0.4gm
1oz = 30 ml
1oz/30ml = 6oz /x , x = 180ml
0.66 0.3

0.4
0.1 0.26
total 0.3 + 0.26 = 0.56

0.3/0.56 = x/180ml x= 96ml 33mg/5ml answer
0.26/0.56 = x/180ml x= 83 5mg/5ml answer

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