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titrating biodiesel for soap

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titrating biodiesel for soap

Post  whatarascal on Fri Oct 15, 2010 11:24 am

Good afternoon people

I wish to titrate biodiesel for soap content.There are video's on you tube describing how.
I have all the bits required including bromophenol blue and hydrochloric acid.
The acid is at 38% and I need a solution of .01N HCl.
Well its a long time since I was at school and even then I may not have been capable of working this out.
I require 1 litre of the .01 solution.
Would one of you bright young sparks tell me how to work this out or better still calculate it for me.
It would be great if I knew the right amount of acid to add to the distilled water.

Thanks a lot in advance


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.01 N HCL from 38% HCL

Post  Thesci3141 on Wed Dec 29, 2010 8:46 am

If my calculations are correct this morning, you will need to add 5.06ml of your 38% HCL to enough H2O to make up 1-Liter. Note: Use accurate pipette for the 5.06ml of acid and add to 1-liter volumetric flask half full of distilled H2O,mix,then add more H2O to proper level. This is at a temperature of 20'C /68'F.


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