The ph scale, Chemistry

The pH scale:

The equation: pKw=14.00=pH+pOH is obtained by taking the negative logarithm to the base 10 of the autoprotolysis equation, where

538_ph scale.png

In general pX denotes -log10 of any given variable X, so that an increase in X results in a decrease in pX. This equation applies in all aqueous solutions. It allows the definition of the pH scale for water acidity from the pH of a solution, pOH ions can always be found from this equation, and the balance of these terms determines the water acidity. For example, when pH=7, then pOH=7 and the water solution is neutral (ph=7), as the activities of both H3O+ and of OH- are equal at 10-7. When pH+<7 and pOH->7, the solution has an excess of H3O+ and is described as an acidic solution. When pH+>7 and pOH_<7, the solution has an excess of OH- ions and is described as a basic solution.

 

 

 

Posted Date: 7/20/2012 3:42:58 AM | Location : United States







Related Discussions:- The ph scale, Assignment Help, Ask Question on The ph scale, Get Answer, Expert's Help, The ph scale Discussions

Write discussion on The ph scale
Your posts are moderated
Related Questions

How does math relate to electrons and ion formation?

The ratio between the neutrons in C  and  Si  with respect to atomic masses 12 and 28 is: (1) 2 : 3  (2) 3 : 2       (3) 3 : 7             (4) 7 : 3 Ans: 3 : 7

what can be formed by sodium reacting with epsum salt

what is the role of structural protein, their types, how are they formed, significance.


physical and chemical properties of matter

a small 0.600ml bubble forms at the bottom of a lake where the temperature is 4.0 degrees Celsius and the pressure is 2.40 atm. What volume will the bubble occupy near the surface

what is attacking reagent/what its type give detail about this

what is the molar mass of C3H4