Electronic Components/pH Calculations.

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pH Meter
pH Meter  
Dear Deirdre

http://en.wikipedia.org/wiki/PH
http://en.wikipedia.org/wiki/PH_meter
http://www.allaboutcircuits.com/vol_1/chpt_9/6.html
http://www.ehow.com/how_4781811_use-ph-meter.html
http://www.bosworthinstrument.com/pH_meters_uses.html
http://www.ehow.com/facts_5011477_what-ph-meter-used.html
http://wiki.answers.com/Q/Applications_of_pH_meter
http://www.noormd.com/phvj.ppt
http://www.professionalequipment.com/digital%20pH%20meter/related.html

The pH Calculations of different Liquids whether acidic (0 to 6), neutral (7) or alkaline (8 to 14) may vary with different temperatures and results may not be accurate as shown by Digital pH Meter ?

As a example :

Water at 25 degree Celsius is neutral i.e. pH Value is 7, at some other temperature the pH Value may be different.

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

Answer
Actually, the problem isn't that the pH meter doesn't show the correct pH - the problem is that the pH of individual chemicals varies with temperature. For that reason, testing is either done at a specific temperature, or the temperature may be recorded with the pH reading.

One of the problems in measuring pH is that the reactivity of acids will vary with temperature. A properly calibrated pH meter will read correctly, but the solution will have a different pH at different temperatures. You can't simply say that a chemical has a pH of some value - that pH will be dependent upon temperature. One good discussion is here: http://www.newton.dep.anl.gov/askasci/chem00/chem00920.htm

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Deirdre Hebert

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I can answer most questions regarding electronic components, what they are and how to use them.

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I worked for a number of years in the electronic component testing industry, designing and building automated test equipment for the electronic manufacturing industry.

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Numerous technical manuals for the equipment we built.

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UNH, CCAF and others

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General Electric, Motorola, Ford, Sensonor and others.

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