16. Ions and Equilibrium;
       Acids and Bases
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       Dissociation of Water



A simple calculation can show how small a fraction of water molecules is dissociated. A concentration of 1.0 x 10-7 moles of H+ per liter of water means that 1.0 x 10-7 moles of H2O has dissociated per 55.5 moles of water, or one part in 0.56 x 10-9.



Approximately two water molecules out of every billion are dissociated into H+ and OH- ions. The animation shows what a tiny percentage that actually is...

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