Difference between revisions of "Hydroxide Ion (Chemistry)"

Revision as of 17:43, 7 April 2019

A Hydroxide ion (OH^-), is a negative ion of Hydrogen bonded to Oxygen found in acid solutions.

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

Hydroxides in solution are alkalis.

Hydroxide ions are responsible for the corrosive properties of alkalis.

Hydroxide has gained an electrons to have a relative charge of -1.

Hydroxide forms ionic bonds with positive ions.

Hydroxides are ionic compounds.

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)

Metal Oxides react with water to produce Metal Hydroxides which also form Hydroxide ions.

Na₂O(s) + H₂O(l) → 2Na⁺(aq)+2OH^-(aq)

K₂O(s) + H₂O(l) → 2K⁺(aq)+2OH^-(aq)

MgO(s) + 2H₂O(l) → Mg⁺²(aq)+2OH^-(aq)

CaO(s) + 2H₂O(l) → Ca⁺²(aq)+2OH^-(aq)

Al₂O₃(s) + 3H₂O(l) → 2Al⁺³(aq)+6OH^-(aq)

Ammonia also reacts with water to produce Hydroxide ions:

NH₃O(aq) + H₂O(l) ⇌ NH₄⁺(aq)+OH^-(aq)

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 ===About Hydroxide Ions===
 : When a [[base|basic]] [[compound]] [[dissolve]]s in [[water]] it forms '''Hydroxide ions'''.
+: '''Hydroxides''' in [[solution]] are [[alkali]]s.
 : '''Hydroxide ions''' are responsible for the [[corrosive]] [[property|properties]] of [[alkali]]s.
+: '''Hydroxide''' has gained an [[electron]]s to have a relative [[Electrical Charge|charge]] of -1.
+: '''Hydroxide''' forms [[Ionic Bond|ionic bond]]s with [[Positive Ion|positive ions]].
+: '''Hydroxides''' are [[Ionic Compound|ionic compounds]].
 ===Examples===