composition of water

"earthsaver1" <[email protected]> Thu, 24 Jan 2013 21:02:16 -0000

Newsgroups	gmane.science.chemistry.the-chemistry-cluster
Message-ID	<[email protected]>

My understanding of water is that it is composed of H2O molecules, H+ and OH-.  Can someone explain to me how the water breaks apart to give the 2 ions and likewise reform to form water.  I understand there are bonds broken but is there a reason why?
Sorry if this is naive but I am a Biology teacher trying to explain this question to a student.
Thank you in advance

Dick



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