Quote: Originally posted by woelen ![](images/xpblue/lastpost.gif) |
@CHRIS25: You have appr. 2.5 mol/l of free HCl in your solution. This is quite strongly acidic, appr. 8% of HCl by weight in your solution.
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Hi Woelen, Yes, the only reference that I have ever found on the web states a 2.5 to 3.0 mole operating at 1.25 density, that last bit to ascertain.
But I think that based on feelings my 2.5 mol concentration seems to be adequate, it takes 5 to 7 hours for what I am etching, it's BIG. Once I had
to etch for 8 hours.
Woelen, I appreciate your help and you have helped enormously with your steering. I just wished that someone had mentioed that my NaOH titration was
revealing acid concentration, I actually did not know that. Thankyou. I may even post some work photos on this board for those who have
contributed to my difficult chemical learning. I don't think that would be wrong because after all, it is all Pure and Unadulterated chemistry, no
added preservatives or colours, no paints, it's all chemistry in action albeit artistic. |