A ==Key Stage 3=====Meaning===An [[chemicalalkali]] is a [[Metal Hydroxide]] [[solution]] that has a [[pH]] more than [[neutral|7]] that is . ===About Alkalis===: [[Alkali]]s can be an [[Irritant]], [[Harmful]] or [[Corrosive]] and should be handled with care.: [[Alkali]]s can be used to [[Neutralisation|neutralise]] [[acid]]s.: [[Alkali]]s can be [[concentrated]] or [[dilute]].: [[Alkali]]s can be [[Weak Alkali|weak]] or [[Strong Alkali|strong]] which depends on the type of [[alkali]] and the [[concentration]].: [[Alkali]]s turn [[Litmus]] paper blue.: [[Alkali]]s turn [[Universal Indicator]] blue, indigo and purple depending on the strength of the [[dissolvedalkali]] in water.Some common [[Alkali]]s you should know:*[[Sodium Hydroxide]]*[[Potassium Hydroxide]]