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plz tell me some short tricky formulae to solve numerical prob. on this topic .. what is the formulae for finding the pH.......?

nivi jain , 13 Years ago
Grade 12
anser 1 Answers
Aman Bansal

Last Activity: 13 Years ago

Dear Nivi,

pH is defined as the negative logarithm of the H+ concentration.
pH = - log [H+]

A logarithm is an exponent. It is the exponent you have to put on the base number (which is 10 for common logs) to get the original quantity.

pH = - log [H+], so
-pH = log [H+]
-pH is the exponent you have to put on the base 10 to get the [H+]
10^-pH = [H+]

The equation in your question is called the Henderson-Hasselbalch equation. It is used for finding the pH of a buffer solution. In this equation:
Ka = acid dissociation (ionization) constant of the weak acid.
pKa = - log Ka
A- is the anion base of the conjugate acid HA.

Best Of Luck...!!!!

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