Posted by **Fai** on Thursday, August 9, 2012 at 11:06pm.

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?

My calculation

500ml x 1:200 =2.5 1:200 means 1gm/200ml

2.5 x 36.5 = 91.25

91.25/0.38=240.13

240.13/1.18 = 204ml This is my answer. I am not sure. Pls helps me .

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