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Being simultaneously basic and acidic, water undergoes autoprotolysis, also called self-ionization:
The equilibrium constant is
H3O+ in these equations is general simply written H+. In pure water and in solutions that do not give any additional source of H+ or OH- both ions have molar concentrations exact to 10-7. Addition of an acid decreases [OH-] and hence increases [H3O+]; addition of a base has the reverse effect.
The pH scale is defined by
Neutral water has a pH of 7, acidic solutions have lower values of ph (typically 0-7), and basic solutions or alkaline higher values (7-14). In alkaline or basic solutions [OH-] is thus greater than [H+].
Strong and weak behavior
The equilibrium constant of the protolysis reaction
is known as the acid dissociation constant (Ka) of HA or the acidity constant:
It is often expressed as a pKa value, described as
assigment work of crossion
Why lanthanides shows more than 7 coordination number
When the azimuthal quantum number has a value of l=0 , the shape of the orbital is: (1) Rectangular (2)Spherical (3)Dumbbell (4)Unsymmetrical Ans: Spherical
Homolysis bond fission or Homolytic (i) In homolysis bond, the covalent bond is broken in such a way that every resulting species gets its own electron. This is apt to the crea
Q. Use the following information to draw a temperature-composition phase diagram for the binary system of H 2 O (A) and Na 2 SO 4 (B) at p = 1 bar, confining t to the range 20 to
The band model of solids is an extended of the molecular orbital (MO) method. The overlap of atomic orbitals in an extended solid produces rise to continuous bands of electronic en
Draw the structure of anisole and phenetole
If molecular mass and atomic mass of sulphur are 256 and 32 respectively, its atomicity is: (1) 2 (2) 8 (3 )4 ( 4)16 Ans: 8
A Tris buffer at pH 6.0 (here "Tris" is a nickname use for Tris hydroxymethyl amino methane). For the given pK A table is Tris a compound you would select for a buffer at pH 6.0?
Advantages of ICP-AES method: The wide applicability of ICP-AES in the quantitative analysis of various materials can be attributed to the following advantages. Rapid a
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