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Created page with "==Key Stage 4== ===Meaning=== A '''Hydroxide ion''' ('''OH<sup>-</sup>'''), is a positive ion of Hydrogen found in acid solutions. ===About Hydro..."
==Key Stage 4==
===Meaning===
A '''Hydroxide ion''' ('''OH<sup>-</sup>'''), is a [[Negative Ion|positive ion]] of [[Hydrogen]] found in [[acid]] [[solution]]s.
===About Hydroxide Ions===
: When a [[base|basic]] [[compound]] [[dissolve]]s in [[water]] it forms '''Hydroxide ions'''.
: '''Hydroxide ions''' are responsible for the [[corrosive]] [[property|properties]] of [[alkali]]s.
===Examples===
[[Metal Hydroxide]]s form '''Hydroxide ions''' in [[water]].
: NaOH(aq) → Na<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
: KOH(aq) → K<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
: Mg(OH)<sub>2</sub>(aq) → Mg<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Ca(OH)<sub>2</sub>(aq) → Ca<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Al(OH)<sub>3</sub>(aq) → Al<sup>+3</sup>(aq)+3OH<sup>-</sup>(aq)
[[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)
: KOH(aq) + H<sub>2</sub>O → K<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
: Mg(OH)<sub>2</sub>(aq) + 2H<sub>2</sub>O → Mg<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Ca(OH)<sub>2</sub>(aq) + 2H<sub>2</sub>O → Ca<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Al(OH)<sub>3</sub>(aq) + 3H<sub>2</sub>O → Al<sup>+3</sup>(aq)+3OH<sup>-</sup>(aq)
===Meaning===
A '''Hydroxide ion''' ('''OH<sup>-</sup>'''), is a [[Negative Ion|positive ion]] of [[Hydrogen]] found in [[acid]] [[solution]]s.
===About Hydroxide Ions===
: When a [[base|basic]] [[compound]] [[dissolve]]s in [[water]] it forms '''Hydroxide ions'''.
: '''Hydroxide ions''' are responsible for the [[corrosive]] [[property|properties]] of [[alkali]]s.
===Examples===
[[Metal Hydroxide]]s form '''Hydroxide ions''' in [[water]].
: NaOH(aq) → Na<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
: KOH(aq) → K<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
: Mg(OH)<sub>2</sub>(aq) → Mg<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Ca(OH)<sub>2</sub>(aq) → Ca<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Al(OH)<sub>3</sub>(aq) → Al<sup>+3</sup>(aq)+3OH<sup>-</sup>(aq)
[[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)
: KOH(aq) + H<sub>2</sub>O → K<sup>+</sup>(aq)+OH<sup>-</sup>(aq)
: Mg(OH)<sub>2</sub>(aq) + 2H<sub>2</sub>O → Mg<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Ca(OH)<sub>2</sub>(aq) + 2H<sub>2</sub>O → Ca<sup>+2</sup>(aq)+2OH<sup>-</sup>(aq)
: Al(OH)<sub>3</sub>(aq) + 3H<sub>2</sub>O → Al<sup>+3</sup>(aq)+3OH<sup>-</sup>(aq)