why ph is between 0 to 14
- 6 Answers
- 22260 Views
- Apotex, Reliance, Zydus Cadila, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
*** The equation for finding the pH of a solution is –log
([H+]). That is, the negative log of the molarity of the
hydrogen ions released by the compound in solution. Almost
no chemicals can release hydrogen ions with a molarity
greater than 1 or less than 10^-14. However, there are some
rare cases where the pH of a solution is not between 0 and
14. For example, 10 molarity hydrochloric acid (there are
ten moles of hydrochloric acid for every liter of water.),
has a pH of -1 (-log (10) =-1). But these are so rare in
occurrence
| Is This Answer Correct ? | 28 Yes | 9 No |
Answer / sp goswami
The pH concept was introduced in 1909 by the Danish chemist
S.P.L.Sorenson
pH is defined by the negative logarithm of the hydrogen ion
activity:
where aH = activity of the hydrogen ion
The pH scale derives from the characteristics of the auto-
dissociation of Water. Pure water has a low conductivity
and is only slightly ionised however does Water dissociate
slightly into Hydronium ions and hydroxide ions:
or
The concentration of H+ and OH- ions, which are equal, are
1x 10-7 ions per litre The equilibrium constant (or ion
product ) for the dissociation of water, Kw, is
by taking logs of both side we get:
Using the standard abbreviation p for {-log10} we get:
This equation sets the pH scale to 0-14, which gives a
convenient way to express 14 orders of magnitude of [H+].
Any solution with pH>7 contains excess hydroxyl ions and is
alkaline those with pH<7 are acidic, containing excess
hydrogen ions. Regards
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / panchanan basantia
pH stands for potency of hydrogen or strenght of hydrogen
the con. of hydrogen is 10nth to the power -14 so pH value is shows 1 to 14
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / usharani
Because of condivity of water is 1.0 x 10 -14
if water dissociation is H+ and OH-
H2O = 1.0 x 10-14
log (H2O) = log (1.0 x 10-14)
PH = 14.
| Is This Answer Correct ? | 2 Yes | 3 No |
how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.
what is peak purity and its formula
Why we use Uracil for HPLC calibration in Detector wave ength accuracy test?
Calculate the water content in Di Sodium Tartrate (DST) based on molecular weight?
Why we show ammonia vapours to tlc plate?to which compounds?
why we are doing seal wash and needle wash?
What is the difference between known and unknown impurities?
why we are adjusting the ph in buffer solution preparation
why in hplc peaks are in positive side(it means upside) not in negative side?
If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately
What is Endcapped Hplc column
from where i get mortar pastle for glass bottle crush? it's required for testing of it?
Organic Chemistry 
