Water that is partly salty and partly fresh

Water ionizes by the equation h2o(l)⇌h+(aq)+oh−(aq) the extent of the reaction is small in pure water and dilute aqueous solutions. this reaction creates the following relationship between [h+] and [oh−]: kw=[h+][oh−] keep in mind that, like all equilibrium constants, the value of kw changes with temperature.

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

Answer explain why it is not possible to deduce a complete order of reactivity.