- Dec 22, 2016
- Reaction score
Oh, well yeah we all knew that lol! I thought with the MC dissolved already that could have been making the BE dissolve more slowly, or not completely.... uhhhhh,... ... no mate, this is about the thermodynamics of a salt dissolving --(think relative ease of water pulling off component ions)... technical stuff, but it comes down to charge strengths and the specifics of the reaction in water,... this could go into a whole lecture, particularly about water! The reason water can do this with both + and - charges is this: the water molecule itself is net neutral in charge, but had very strongly polar +/- ends...In this this graphic, imagine those electrons in the H atoms sucked into close proximity to the Oxygen atom.... O is a major electron hog (high electronegativity), so much so that it basically rips the electrons clean off of the H atoms ( no longer in orbit around the H atoms, or very nearly so literally), leaving what amounts to bare-assed protons hanging out one end, while the O is loaded with electrons, making it powerfully negative in charge... these charged ends are not free to make true bonds with salts, but are plenty strong enough to yank them off the crystal (having a stronger affinity to water's oppositely charged ass end than it's component counterpart salt ion that's in the crystal)... quiz Friday!!