Changes

An [[alkali]] is [[base|basic]] [[compound]] which [[dissolve]]s in [[water]] to form [[Hydroxide Ion(Chemistry)|OH^- ions]] making a [[solution]] with [[pH]] greater than [[Neutral (Chemistry)|7]].

: [[Alkali]]s are [[base]]s in [[solution]] which form [[Hydroxide Ion(Chemistry)|Hydroxide ions]].: When a [[base]]ic [[compound]] [[dissolve]]s in [[water]] a [[Hydroxide Ion(Chemistry)|Hydroxide ion]] becomes dissociated from either the [[base|basic]] [[compound]] or from a [[water]] [[molecule]]. That [[Hydroxide Ion(Chemistry)|Hydroxide ion]] is free to move separately in the [[solution]].: 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]].: The strength of an [[alkali]] is measured on the [[pH]] scale. The more [[Hydroxide Ion(Chemistry)|Hydroxide ions]] in a [[solution]] the lower the [[pH]].