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Topic: ph  (Read 5191 times)

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chemicalLindsay

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ph
« on: June 19, 2004, 04:36:04 AM »
I was just wondering cause all my books that I have explain ph really weirdly so I would just like a symplified version of ph (the strength of an acid or base) .I would like to also know how top calculate ph of acids and bases.

Offline Donaldson Tan

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Re:ph
« Reply #1 on: June 19, 2004, 11:52:42 AM »
pH = - lg [H+]

pH is just a mathematical function of the concentration of the hydrogen ion.

Generally, at RTP, pH 7 is the neutral point. Above it is considered alkali, below it is considered acidic.
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Offline AWK

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Re:ph
« Reply #2 on: June 20, 2004, 06:49:46 AM »
Neutral point pH=7 slightly depends on temperature (this is for 22 C). At higher temperature neutral point is below pH=7,  at lower - slightly above pH=7.
PH=7 is commonly accpter for unprecised room temperature.
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chemicalLindsay

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Re:ph
« Reply #3 on: June 26, 2004, 04:45:53 AM »
THANKS VERY MUCH

Offline Mitch

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Re:ph
« Reply #4 on: June 26, 2004, 05:23:45 PM »
You can make your own ph indicator by boiling purple cabbage. You can then take that liquid and examine the phs of common house hold products.  8)
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