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![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Apr 2008 15:22:49 IST
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can ph be greater than 14 and less than zero??
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6 Apr 2008 15:25:13 IST
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Yes it can be
vary wid temperature
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But In The End
It Doesnt Even Matter... |
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6 Apr 2008 15:30:09 IST
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yeah sure pH cn be -ive :)
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Theoretically, value of pH could range from - infinity to + infinity but practically the limits in aqueous solutions are from -1.2 to +15 pH is basically not equals to -log[H+] bt it actually depends upon the thermodynamics activities rather than [H+] ie on log aH+ where aH+ =[H+]F+ . in dilute solution F+ is near enough to unity and thus aH+ =[H+]. thus ph of 10m solution can't be calculated n its near to zero
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6 Apr 2008 15:43:36 IST
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na it cant b -ve. or >14
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6 Apr 2008 16:09:34 IST
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then why r we taught that it lies between 1 and 14?
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xxxxxxxxxxxxxxx Dylan João Colaço .xxxxxxxxxxxxxx |
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6 Apr 2008 16:55:09 IST
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this is becoz we can only calculate ph frm 1 to 14 practically by using conventional ph meter.
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