why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?
- 5 Answers
- 22330 Views
- Granules, Orchid, Avra, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / aditya
Beacuse the ionic Product of water At 25oC 1×10-14
please let me know if it is wrong
| Is This Answer Correct ? | 6 Yes | 1 No |
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.
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / ankit
H2O dissociates in 7 H and 7 OH so max 14 and 7 neutral
| Is This Answer Correct ? | 9 Yes | 6 No |
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
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / ankit
water dissociates in 7H,7OH so it would be max14 and 7 is neutral
| Is This Answer Correct ? | 2 Yes | 9 No |
how can you decide API molucule acedic or basic compound by test?
Defination of ZEEMAN EFFECT in NMR ?
What is the diff b/n OVI and Residual solvents
Why dissolution apparatus having 8 jars ?
In the test for control of absorbance in UV calibration why do we use only potassium dichromate and what is purpose of taking a specified amount of 57.0-63.0mg?
8 Answers Aurobindo, Cipla, FDC,
What is descriminatory disolution medium ?
3 Answers Cipla, Graviti Pharmaceuticals,
1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer
what you do when compound having dwel wavelength?
what is the difference between gc& hplc. why we r not calculating purity by gc for final products
How to calculate %w/w and %v/v of a component(or solvent)by NMR
in sampling of raw material which side is pasted sampled labels
what is batch no. of prednisole tablet.
Organic Chemistry 
