Titrating Biodiesel for soap content

[whatarascal]

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

 

[chemisttree]

You are talking about making up a 0.01 N solution rather than a 0.0100 N solution so you don't need to be very exact since you only want 1 significant figure for your standard. If that's what you want, dilute the 38% HCL (12 N) by adding 0.83 mL of the concentrated acid to a 1L flask and dilute to the mark. If you can't accurately measure less than 1 mL, first add 1 mL strong acid to 5 mL water and use only 5 ml of the resulting 6 mL of solution in a liter of water.