Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...


why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?

Answers were Sorted based on User's Feedback



why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?..

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

why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?..

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

why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?..

Answer / ankit

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

Is This Answer Correct ?    9 Yes 6 No

why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?..

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

why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?..

Answer / ankit

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

Is This Answer Correct ?    2 Yes 9 No

Post New Answer



More Analytical Chemistry Interview Questions

what is the diff betwen calibration and system suitability?

8 Answers  


how to calibrate AAS ? give me the procedure?

3 Answers  


why we are using benzene, anyline in acetic anhdride assay titration method?

0 Answers  


What is zero water in TOC Analysis?

1 Answers   Orchid,


How do we fix the sample concentaryion in hplc method development. what is the basis?Thanks in advance

4 Answers   DRL, Glenmark, Orchid,






why in uv we take k value less than 1

2 Answers  


In UV calibration we use Holmium perchlorate solution made in 1.4M perchloric acid The question is that 1.4 M perchloric acid we make is it in water or glacial acetic acid?

4 Answers  


Why do we use KCl ,K2Cr207,Toulene & Halonium oxide for the caliberation of UV

2 Answers   Apotex,


how do u optimise hplc method

1 Answers  


my name is santhosh i cmpleted b.pharmacy in 2009 then i went to uk in 2010 to pg diploma business management. after i came back to india.. recently again apply to uk for pharmaceutical analysis. they refused my visa you failed to explain y u r change subject. so plz ineed answer for y change the cource

1 Answers  


what is mean by content uniformity?

5 Answers  


full name of OOS & OOT ? Dercribe it with details ? why this is needed in pharma industry ?

10 Answers   Orchid,






Categories
  • Organic Chemistry Interview Questions Organic Chemistry (302)
  • Inorganic Chemistry Interview Questions Inorganic Chemistry (123)
  • Analytical Chemistry Interview Questions Analytical Chemistry (1258)
  • Physical Chemistry Interview Questions Physical Chemistry (62)
  • General Chemistry Interview Questions General Chemistry (478)
  • Chemistry AllOther Interview Questions Chemistry AllOther (189)