Concept explainers
Interpretation: ”The of solution can be determined by ”should be explained
Concept Introduction:
► of a solution is defined as the negative logarithm of the hydrogen ion concentration of the aqueous solution.
Thus,
► Water is a very weak conductor of electricity. This suggests that it undergoes self-ionization to a very small extent. Due to self ionization, the following equilibrium is set up between water and its ions.
Applying law of mass action, the equilibrium constant for the self ionization of water can be written as
Since degree of ionization of water is very low, its ionization does not appreciably changes the concentration of water molecules. Therefore may be regarded as constant.
where is a constant representing
Now,
Where is the product of two constant
is called the ionic product of water and its value is
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