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1. Supercritical Fluid

   Linked via "ionic dissociation constant"

   Altered Ionic Dissociation
   The dielectric constant of water drops sharply in the supercritical regime. At $400 \text{ °C}$ and high pressure, $\epsilon$ falls from $\approx 80$ to about $10$. This drastic change causes water to behave more like a non-polar organic solvent. Consequently, the ionic dissociation constant ($Kw$) decreases significantly, meaning that $\text{SC-H}2\text{O}$ is a poor solvent for salts- (which precipitate out) but an excellent solvent for n…