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Base
,→Key Stage 4
==Key Stage 4==
===Meaning===
A [[base]] is a [[compound]] which is able to produce [[Hydroxide Ion(Chemistry)|OH<sup>-</sup> ions]] when [[dissolve]]d in [[water]] to form a [[solution]] with a [[pH]] greater than [[Neutral (Chemistry)|7]].
===About Bases===
: [[Base]]s will [[Chemical Reaction|react]] with [[acid]]s to form a [[salt]].
: Some [[base]]s are [[insoluble]].
: A [[soluble]] [[base]] will [[dissolve]]s in [[water]] to produce an [[alkali]] which has [[Hydroxide Ion(Chemistry)|Hydroxide ions]] which are either donated by the [[base]] or formed by a [[Chemical Reaction|reaction]] with [[water]] to form a [[Hydroxide Ion(Chemistry)|Hydroxide ion]].: The [[Hydroxide Ion(Chemistry)|Hydroxide ion]]s in an [[alkali]] will donate [[electron]]s to [[Hydrogen Ion(Chemistry)|Hydrogen ions]] to form [[water]]. This is a [[neutralisation]] [[Chemical Reaction|reaction]].