Answer / aditya

Beacuse the ionic Product of water At 25oC   1×10-14


please let me know if it is wrong
 

Answer / falguni patel

We know that
H+ + OH- --> H2O
Equilibrium constant Kw is
[H+] [OH-] = Kw = 1*10^-14
By applying -log on both side
-log [OH-] - log [H+] = 14
We know that pH = -log [H+]
So pH = 14 - (-log [OH-])
From this eq that the higher the concentration of OH- ions, the lower the value of -log[OH-]. If the concentration of OH- ions reaches 1mol/dm3, the value of-log [OH-] is zero, which acc to eq gives pH 14.
If conc exceed from 1 ,-log [OH-] would be negative and pH is grater than 14.

Answer / ankit

H2O dissociates in 7 H and 7 OH so max 14 and 7 neutral

Answer / naveen gutta

Go through this link I hope you'll find the right answer
http://chemwiki.ucdavis.edu/Physical_Chemistry/Acids_and_Bases/Aqueous_Solutions/The_pH_Scale

Answer / ankit

water dissociates in 7H,7OH so it would be max14 and 7 is neutral

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