55. You have received a medication order to prepare 500 mL of a 1:500 solution. The...

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55. You have received a medication order to prepare 500 mL of a 1:500 solution. The pharmacy has irn stock a concentrate of 80%. How much of the concentrate will you need to use? a. 1 mL b. 1.25 mL c. 498.75 mL d. 499 mL

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Answer 1

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55. You have received a medication order to prepare 500mL of a 1:500 solution. The pharmacy has in stock a concentrate of 80%. How much of the concentrate will you need to use?

s1v1=s2v2

(1/500) x 100% = .2%

(500 mL)(.2%) = x (80%)

x= 1.25

So, here the answer is option 'b' ie, 1.25ml

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