I've used FeCl3 for etching printed-circuit boards. It's acidic (salt of a strong acid & weak base) and can cause skin irritation, but I never had any problems when it got on me (some people are more sensitive). You should wear eye protection, though.
Hg will not react with Al2O3. Al is very electropositive and won't easily let go of any oxygen atoms its bonded to. What happens when Hg contacts Al (and many other metals, as well) is amalgamation, which is like forming a solution. It's a physical, not chemical, process.
Gray Sn is an allotrope of Sn which is more stable than white Sn at lower temperatures. Actually, at room temp, white Sn is slowly turning into gray, though the process is extremely slow. There's a case I read about involving a old pipe-organ in Germany, which had pipes made of Sn that...
I did a web search on "power bait" and found that it's called a "soft plastic" bait. There's an old rule in chemistry that's usually valid which goes "like dissolves like." If the bait has similar chemical properties to the bait container, and is liquid/mushy, it will probably dissolve the...
Ah, the "tin pest"... I don't know for sure how to do it, but I think you might have better luck in getting help if you ask the question in the materials engineering forum.
"Liquifaction" (I think that's the correct spelling) just means turning something into a liquid. The Ideal Gas Law assumes that the space occupied by, and the forces between, the atoms/molecules of a gas can be ignored. It's a valid approach for low pressure and high temperature. But how does...
"If the tub is insulated and there are no pathes except for the circuit in question..."
One side of the power line is grounded, and current will therefore flow from the "hot" side through the water, to Earth ground. Try this...fill a bathtub or sink with water, and connect an ohmeter between...
"How would you be in paralle with the toaster, the circuitry of the toaster is confined to the toaster..."
All of the water and everything in it that's a conductor is in parallel with the voltage source in the toaster. Here's a similar situation which illustrates the point. Suppose you have a...