OT Proc je pH do 14?

[Petr Simek]

On Sat, 14 May 2016, balu wrote:

> par odstavcov pod tym pisu uplne nieco ine, staci docitat stranku az do konca 
> :-)

Nevsiml jsem si ze by tam popirali sami sebe, tedy uvod, jen doplnuji ze
diky tomu zvolenemu rozsahu stupnice muze pH u kyselin vyjit i zaporna
nebou silnych zasad >14 .


> It is common that the pH scale is argued to range from 0-14 or perhaps 1-14 
> but neither is correct. The pH range does not have an upper nor lower bound, 
> since as defined above, the pH is an indication of concentration of H+.


*------------------------------------------------------------------------*
|                          Petr Simek   APS JU                           |
|                             psimek na jcu.cz                              |
*------------------------------------------------------------------------*

>
> On 14/05/2016 13:31, Petr Simek wrote:
>> On Sat, 14 May 2016, Pavel Hudecek wrote:
>> 
>>> Dobrý den všem,
>>> 
>>> proč je pH do 14? Všude píšou, že je v rozsahu 0-14, ale nikde není
>>> vysvětleno proč.
>>
>>         pKw=pH+pOH=14
>>
>>         pH is -log [H+]
>>        pOH is -log [OH-]
>> 
>> a to H+ nebo OH- se zadava v M coz je mol/litr . Je to tedy logaritmus
>> mnozstvi H+ v litru a kdyz je H+ a OH- stejne tak je to neutralni.
>> Aspon tak nejak jsem to pochopil.
>> 
>> http://chemwiki.ucdavis.edu/Core/Physical_Chemistry/Acids_and_Bases/Aqueous_Solutions/The_pH_Scale