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September 1, 2014

Homework Help: Chemistry

Posted by Fai on Sunday, July 29, 2012 at 1:00pm.

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 1:200 HCL solution? The answer is not 2.12ml
My calculation:
1.18g/ml x 1000ml x 0.38/36.5 = 12.28M
500ml x 1:200 = 2.5
12.28/2.5 = 4.9ml

Who helps me to solve it for me. Tell me the right answer. Please help

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