I thought I would post these. I found them some time ago, but didn't think to post them until I read this post.
If this is not appropriate please let me know, I don't want to step on another person's hard work, and it seems Geo has put a lot of thought into this.
EDITED -- Keep in mind that all these processes should only be attempted if you are skilled and knowledgeable enough to do them safely. Some of the posted video's may not show the best ways to be safe. If there is any question as to how to do anything safely, you should ask or check with someone who knows before you attempt anything -- EDITED
The "NurdRage" YouTube channel has a lot of useful video's on many of the things we use in recovering and refining. Here are videos on making acids.
Nitric Acid
[youtube]http://www.youtube.com/watch?v=2yE7v4wkuZU[/youtube]
Sulfuric Acid
[youtube]http://www.youtube.com/watch?v=okvvD3-DF9U&feature=channel&list=UL[/youtube]
Hydrochloric Acid
[youtube]http://www.youtube.com/watch?v=YGjd7xxTuZw&feature=relmfu[/youtube]
Also a video on Stump Remover
[youtube]http://www.youtube.com/watch?v=IG-fvPHzEoc&feature=channel&list=UL[/youtube]
More in the next post