why ph is between 0 to 14

Answers were Sorted based on User's Feedback



why ph is between 0 to 14..

Answer / bhupalreddy

*** 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

why ph is between 0 to 14..

Answer / spatil

No one can gives satisfied answer....

Is This Answer Correct ?    5 Yes 3 No

why ph is between 0 to 14..

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

why ph is between 0 to 14..

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

why ph is between 0 to 14..

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

why ph is between 0 to 14..

Answer / a. lavanya

it is basic nature so pH IS 0-14

Is This Answer Correct ?    2 Yes 43 No

Post New Answer

More Analytical Chemistry Interview Questions

If we have 120 minutes run time method for HPLC and you wan to decrease the Run time so what should you do??

6 Answers  


Any molecule is filing for ANDA purpose, what are the dissolution requirements / specifications needed ?

1 Answers   IPCA,


why we are using in ph calibrations ph4,7,9.2 buffers only?

5 Answers   Reddy Labs,


Why karl fisher factor is 5 ?

1 Answers  


What is differences between the Instrument and Equipment

2 Answers   Aurobindo,






Why dst is used in kf for factor determination less than 1

4 Answers   Reddy Labs, Sun Pharma,


Difference between the quantitative analysis and qualitative analysis?

0 Answers  


Why PH range from 0to14.

2 Answers   College School Exams Tests, Reddy Labs, Wings Customer Care,


Can you please give a suitable definition and an example for understanding the words purity and potency.

6 Answers   Cipla, Malladi Drugs and Pharmaceuticals, Reddy Labs,


In performance Check of GC Why Hexadecane Peak is Considered 

0 Answers   Asian Paints, MSN Pharma,


If combination product how require to identify which imp is of which api?

0 Answers  


In acid base titration, after complet consumption of HCl by NaOH, addition of next drop of NaOH will give pink colour with phenolpthalein indicator. Why this pink colour appear? Why not blue, black, green or anything elese?

3 Answers  


Categories
  • Organic Chemistry Interview Questions Organic Chemistry (342)
  • Inorganic Chemistry Interview Questions Inorganic Chemistry (123)
  • Analytical Chemistry Interview Questions Analytical Chemistry (1387)
  • Physical Chemistry Interview Questions Physical Chemistry (62)
  • General Chemistry Interview Questions General Chemistry (478)
  • Chemistry AllOther Interview Questions Chemistry AllOther (190)