##### alligation in pharmacy calculation

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prepare 30% dextrose using 50% and 5% dextrose solution.  How much of each to make 1 liter?  please show me the work

May 18th, 2015

 To process a prescription order for a 30% dextrose solution, the pharmacy technician would mix the stock solutions of 50% dextrose and 5% dextrose solutions in which ratio? ------------------------------------------------------------Using the alligation method:50 __________ 7.5______50_______5 ___________ 7.57.5 = 7.5 1 : 1the ratio is 1 to 1 If you prepare 1L of a 7.5% dextrose solution using the stock solutions of 5% (D5W) dextrose and 50% (D20W) dextrose, how many milliliters (mL) of each dextrose solution will be needed? ------------------------------------------------------------Using the alligation method:50 __________ 2.5_______7.5________5 ___________ 302.5 is the number of parts of the 50% solution.30 is the number of parts of the 5% solution.2.5 + 30 = 32.5 parts (total number of parts of the 7.5% solution)50% dextrose solution:x / 2.5 parts = 1L/32.5 partsx = 42 mL D20W5% dextrose solution:x / 12.5 parts = 250 mL/15 partsx = 208 mL D5WAdd the volume 42 mL to the volume 208 mL in order to get to the volume of the 7.5% dextrose solution:42 mL + 208 mL = 250 mL

May 18th, 2015

The answer in the work book is 444ml of 5% and 556 ml of 50% can't get this answer

May 18th, 2015

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May 18th, 2015
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May 18th, 2015
Dec 11th, 2016
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