# Pharmacy math

posted by
**Fai**
.

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.