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
Beckmann rearrangement Ketoxime while treated with acid at 0° C it goes through rearrangement termed as Beckmann rearrangement. So, acid catalysed conversion of ketoximes t

What is the name of this reaction cycle?  Which oxidation product is released from the cycle? What are the decreased products?   The reduced products A and B are reoxidiz

classification of mixture according to particle size, uniform mixture, composed of solute and solvent


what can be formed by sodium reacting with epsum salt


ionic equation by ionelectron method (half reaction)


between nitrobenzene and phenol which is more reactive towards chlorine and why? Upon reaction with chlorine what products can be formed from the two reactions.

Complexes of actinides