Interested to Buy Any Domain ? << Click Here >> for more details...
why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?
- 5 Answers
- 22011 Views
- Avra, Granules, Orchid, I also Faced
- E-Mail Answers
Answer Posted / 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 |
Post New Answer View All Answers
WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?
How would you decide dissolution medium for NCE compound of class I drug
Why irmoisture balance is used for corrugated box moisture testing
some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?
why does used dry caffien in HPLC calibration?
How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?
why xterra column require to use at higher ph?
[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?
1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer
Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
in stress study if your api not soluble in hcl naoh h2o2 then what require to do?
can i use hplc detector to uplc and why?
in monograph 7 imp are there but in vendor showing 5 imp do not req to include 2 imp for that what will be justification?
As per ICH related substances stability trend limit from initial to shelf life
why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?
