We came across 2 bottles of hydrochloric acid. We put some in a container with rusted peices of metal. We let them sit for a while and then strained off the used hydrochloric acid. We then poured some more acid into the container with the remaining metal plus a few more peices. We left them sittting a while. About five to six months. After straining the liquid off the top and removing what metal we could, we found a crystalized turquoise-ish looking substace. We are wanting to figure out what the substance is and if it can be useful. Any useful information will be appreciated.

Ferric chloride. Add sodium hydroxide filter the sludge. PLace in an oven for a few hours then collect iron oxide crystals. Make some thermite

Or use it to etch circuit boards...

I don't understand what you are saying. Please type more clearly and less lazy.

My bad my spell check program has been spazing out latly

For those who dont know, Hydrochloric Acid is the main ingredient in Toilet Cleaner. In expirements its used as a substitute for stomach acid. They're similar.

Stomach acid is hydrochloric acid. They aren't 'similar.' They're the same thing.

Also, very few toilet cleaners actually contain hydrochloric anymore, thanks to kidiots using the stuff in conjunction with aluminum foil to blow up soda bottles, splatter acid all over themselves, and get in trouble with the law.

Brick cleaner is commonly hydrochloric acid, though, usually in a 20 to 30 percent concentration. ('Muriatic acid' is an antiquated name for hydrochloric; it is the same thing.)

Could you possibly evaporate the water and get more pure HCl?

Not without vacuum distillation. The HCl will evaporate as well.

the works claims to be hydochloric acid with a rust inhibiter.....whatever the hell that is. so that might be y sgt. sunshine said its similar, because it isnt purely hydrochloric acid. that would probably be like saying mountain dew is the same as water.