When plant or animals after being alive are preserved in sedimentary rocksis called <em>"taphonomy"</em> or fossilization; when they die in a watery environment, and after soft tissues are decomposed, the hard body parts such as shells and bones are turned into a mold when the sediments harden over time.
<em>High pressure</em> is key to generate the mineralization.
<em>Anoxic preservation</em> is also key, which is the condition of being shielded and safe from oxygen to avoid erosion or corrosion.
And of course, the entity must <em>contain hard body parts</em> that could linger over time.
These reaction has two reactants, either the proton donor or the proton acceptor. Water is amphoteric, meaning it can act as an acid or base. Since HCl is an acid, then water in this reaction acts as a base.
1. The proton donor is HCl because it donates H+ to water which yields a hydronium ion, H₃O⁺. 2. The proton acceptor is water.