Difference between revisions of "Hydroxide Ion (Chemistry)"

Revision as of 12:51, 6 January 2019

A Hydroxide ion (OH^-), is a positive ion of Hydrogen found in acid solutions.

When a basic compound dissolves in water it forms Hydroxide ions.

Hydroxide ions are responsible for the corrosive properties of alkalis.

Metal Hydroxides form Hydroxide ions in water.

NaOH(aq) → Na⁺(aq)+OH^-(aq)

KOH(aq) → K⁺(aq)+OH^-(aq)

Mg(OH)₂(aq) → Mg⁺²(aq)+2OH^-(aq)

Ca(OH)₂(aq) → Ca⁺²(aq)+2OH^-(aq)

Al(OH)₃(aq) → Al⁺³(aq)+3OH^-(aq)

Na₂O(s) + H₂O → 2Na⁺(aq)+2OH^-(aq)

K₂O(s) + H₂O → 2K⁺(aq)+2OH^-(aq)

MgO(s) + 2H₂O → Mg⁺²(aq)+2OH^-(aq)

CaO(s) + 2H₂O → Ca⁺²(aq)+2OH^-(aq)

Al_{2_{O₃(s) + 3H₂O → 2Al⁺³(aq)+3OH^-(aq)}}

@@ Line 16: / Line 16: @@
 [[Metal Oxide]]s [[Chemical Reaction|react]] with [[water]] to form [[Metal Hydroxides]].
-: NaO(s) + H<sub>2</sub>O → Na<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
+: Na<sub>2</sub>O(s) + H<sub>2</sub>O → 2Na<sup>+</sup>(aq)+2OH<sup>-</sup>(aq)
-: KO(aq) + H<sub>2</sub>O → K<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
+: K<sub>2</sub>O(s) + H<sub>2</sub>O → 2K<sup>+</sup>(aq)+2OH<sup>-</sup>(aq)
-: Mg(O)<sub>2</sub>(aq) + 2H<sub>2</sub>O → Mg<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
+: MgO(s) + 2H<sub>2</sub>O → Mg<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
-: Ca(O)<sub>2</sub>(aq) + 2H<sub>2</sub>O → Ca<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
+: CaO(s) + 2H<sub>2</sub>O → Ca<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
-: Al(O)<sub>3</sub>(aq) + 3H<sub>2</sub>O → Al<sup>+3</sup>(aq)+3OH<sup>-</sup>(aq)
+: Al<sub>2<sub>O<sub>3</sub>(s) + 3H<sub>2</sub>O → 2Al<sup>+3</sup>(aq)+3OH<sup>-</sup>(aq)