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<p>[QUOTE="desertgem, post: 528583, member: 15199"]Water does dissociate under normal conditions. [FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1]Hydrogen ion concentration in pure water around room temperature is about 1.0 × 10-7 <i>M</i>., which give it a pH of 7.0. [/SIZE][/FONT][/SIZE][/FONT][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1]Hydrogen ion concentration in a PH of 5 is about[/SIZE][/FONT][/SIZE][/FONT][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1] 1.0 × 10-5 <i>M</i>., [/SIZE][/FONT][/SIZE][/FONT][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1] hydrogen ion concentration in a pH of 9 is about 1.0 × 10-9 <i>M</i>. I think theoretically at absolute zero there is no pH as the atoms don't move.</p><p><br /></p><p>A pH of 7.0 is considered neutral because there are equal concentrations of H+ and OH- </p><p><br /></p><p>Jim</p><p>[/SIZE][/FONT][/SIZE][/FONT][/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 528583, member: 15199"]Water does dissociate under normal conditions. [FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1]Hydrogen ion concentration in pure water around room temperature is about 1.0 × 10-7 [I]M[/I]., which give it a pH of 7.0. [/SIZE][/FONT][/SIZE][/FONT][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1]Hydrogen ion concentration in a PH of 5 is about[/SIZE][/FONT][/SIZE][/FONT][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1] 1.0 × 10-5 [I]M[/I]., [/SIZE][/FONT][/SIZE][/FONT][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1][FONT=geneva,Helvetica,Arial,sans-serif][SIZE=-1] hydrogen ion concentration in a pH of 9 is about 1.0 × 10-9 [I]M[/I]. I think theoretically at absolute zero there is no pH as the atoms don't move. A pH of 7.0 is considered neutral because there are equal concentrations of H+ and OH- Jim [/SIZE][/FONT][/SIZE][/FONT][/QUOTE]
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