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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: nammy on August 06, 2008, 08:40:37 PM

Title: How do you calculate Molarity of concentrated HCl?
Post by: nammy on August 06, 2008, 08:40:37 PM

I am almost embarrassed  ::) to ask this question; I have concentrated HCl and I need to make one L of 0.1M HCl. Apparently my brain has gone to seed and doesn't remember how to do this simple task. I am embarrassed because I am a Chemist, but I haven't done this calculation in over 20 years, as we always have stock solutions on hand. Could someone please walk me through this?  ???

Title: Re: How do you calculate Molarity of concentrated HCl?
Post by: macman104 on August 06, 2008, 09:10:19 PM

The concentrated HCL is usually 37% if I remember correctly.  I believe that is weight/weight percent.  You should also have the density available on the jug that the HCl is in.  You can calculate the molarity from there.  Hopefully that gets you on the right track.  Also check out this:

http://en.wikipedia.org/wiki/Hydrochloric_acid#Physical_Properties

Title: Re: How do you calculate Molarity of concentrated HCl?
Post by: Yggdrasil on August 06, 2008, 09:37:34 PM

Conc. HCl is ~12M
http://www.chem.ucla.edu/~bacher/Specialtopics/Concentrations.html

Title: Re: How do you calculate Molarity of concentrated HCl?
Post by: Borek on August 07, 2008, 04:00:09 AM

http://www.chembuddy.com/?left=concentration&right=dilution-mixing

http://www.chembuddy.com/?left=CASC&right=concentration-cheat-sheet

http://www.chembuddy.com/?left=CASC&right=concentration_and_solution_calculator