The first chemical reaction pathway starts with phosphorus (P), which reacts with oxygen (O) to form phosphorus pentoxide (P2O). Phosphorus pentoxide then reacts with water (H2O) to produce phosphoric acid (H3PO4). Phosphoric acid can further react with calcium ions (Ca2+) to form calcium phosphate (Ca3(PO4)2).

The second chemical reaction pathway begins with lithium (Li), which reacts with oxygen (O) to form lithium oxide (Li2O). Lithium oxide can then react with water (H2O) to produce lithium hydroxide (LiOH). Lithium hydroxide can further react with sulfuric acid (H2SO4) to form lithium sulfate (Li2SO4).