Please help with calculations to how to get this answer please Rx 4: How many mL...

Question

Question

Rx 4: How many mL of Alcohol USP should be used in preparing the prescription? Solubility of Drug R in alcohol is 1g/10mL • D

Please help with calculations to how to get this answer please

Answer 1

Answer #1

Hi

Alcohol USP is 95% alcohol with 5 % water.

1gram of drug R dissolves in 10 mL of alcohol.

so for alcohol USP it should be 1 gram of Drug R in 10ml of alcohol USP with water.

So for 5% of drug R should be dissolved in 50 ml of alcohol with little water 2.5 ml. so totally rounded off to 53 ml

Answer 2

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