So I was reading about chip manufacturing today. That led me to the chemical compound, Titanium [Di]silicide (https://www.halbleiter.org/en/metallization/alumi

So I was reading about chip manufacturing today. That led me to the chemical compound, Titanium [Di]silicide (https://www.halbleiter.org/en/metallization/aluminum-technology/ https://www.halbleiter.org/en/metallization/aluminum-technol... "To avoid an increased contact resistance at the interface of titan in silicon a thin layer of titan silicide is used." -- but that's sort of irrelevant to this discussion...) That led me to the Wikipedia page on Titanium Disilicide (https://en.wikipedia.org/wiki/Titanium_disilicide https://en.wikipedia.org/wiki/Titanium_disilicide) -- where it says that Titanium Disilicide is soluble in HF (Hydroflouric Acid) -- But NOT soluble in water -- insoluble, basically! Well, there's no surprise there -- Hydroflouric Acid is a powerful acid -- and dissolves a whole lot of elements and other chemical compounds! Water (H2O) on the other hand -- is pretty inert on the other hand! I mean, it only really dissolves sugar and salt -- and not much else! Or does it? But then I got to thinking about it some more... If we think about it -- Water, pure pH 7 H2O -- reacts pretty violently with some chemicals, such as Sodium and Potassium. In fact, apparently there's more than a few chemical compounds that pure pH 7 water, H2O, will react with: https://www.uab.edu/ehs/images/docs/chem/water_reactive_chemicals.pdf https://www.uab.edu/ehs/images/docs/chem/water_reactive_chem... That leads me to thinking about what an Acid, in Chemistry -- really is... You see, we have this concept in modern Chemistry -- that if something is an Acid -- that it will react with many (but not all!) other chemicals, and conversely, that if something is pH neutral (7) -- like pure water/H2O is -- that it won't react with most other chemicals and chemical compounds... But is that really true? Also -- what about temperature and pressure? A lot of chemical duos that are absolute inert at one temperature and pressure combination -- can and will react at a higher temperature and/or pressure. So now we have to get back to the concepts of "pH", "acid", "base", "corrosive" and "inert". It seems to me that these concepts may dim our thinking on the matter... In my opinion, it would be far better to create tables showing chemical reactions at temperatures and pressures -- than to rely on the pH, the "acidity" or the "baseness", the "corrosivity" or "inertness" -- of chemicals, for our reasoning processes about them... Remember -- every "inert" chemical will react with every other "inert" chemical -- if you can get them both to fusion temperatures -- if you can turn them both into plasma! <g> Which leads to another interesting question: What's the highest temperature and pressure that two elements or chemical compounds in the same container can stand -- without causing a reaction? Also -- could a semiconductor be made out of (pure) water ice? (Maybe just a single transistor first -- as proof of concept?)