Homework Help: Pharmacy math

Posted by Fai on Tuesday, July 24, 2012 at 12:27am.

concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 hcl solution?

Who helps me to solve it for me. I think 2.12 ml is not right.

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