Hi guys, long time no chat (since 2007), But I'm into some other hobbies now and I need some more chemical advice.
First of all I want to make it clear on this subject that I do not take this lightly, I understand all risks involved, to wear proper safety gear and to store and label chemicals properly.
What I want to do is make an etchant for PCB's. A simple formula can be found on the web for muriatic acid and hydrogen peroxide.
That's all fine and good, but the solution is resuable so long as you maintain the level of acid in the solution.
This would be easy if one could obtain hydrochloric acid off the shelf.
I found a video that showed a simple way to make reagent grade HCL with distilled water
Two smaller containers inside one large container, one containing muriatic acid, and the other containing distilled water.
After about a week the HCL ions end up converting the distilled water to reagent grade HCL. (Please forgive my laymans way of putting it.... I'm an engineer, not a chemist)
So here are my questions;
My muriatic acid says "20° Baume Commercial (31.45%), what exactly does this mean?? (I get the percent part)
What is "Reagent grade"
how pure is this?
How should I go about labelling and storing this refined HCL and etchant material?
Is there a better way to refine the muriatic acid into pure hydrochloric acid?
I'm only looking to refine my muriatic acid for topping up my etchant without having to do a bunch of math to figure out the measurements with 68.55% water.
By refining the acid it will be much easier to add the needed amount to "refresh" my etchant.
And this is why I come here, to the people with the real knowledge on the subject to inform me of the need to knows and things I may be overlooking. Help me be safe guys, I know this stuff is super dangerous (I think I'm understating it)
Thanks for any info.