The equilibrium constant for the given reaction has to be calculated.
Acid ionization constant :
Acids ionize in water. Strong acids ionize completely whereas weak acids ionize to some limited extent.
The degree to which a weak acid ionizes depends on the concentration of the acid and the equilibrium constant for the ionization.
The ionization of a weak acid can be given as follows,
The equilibrium expression for the above reaction is given below.
is acid ionization constant,
is concentration of hydrogen ion
is concentration of acid anion
is concentration of the acid
Autoionization of water:
The equation of equilibrium for autoionization of water is,
The equilibrium expression for water at is,
Taking negative logarithm on both sides, we get
The relationship between the hydronium ion concentration and the hydroxide ion concentration is given by the equation,
As and are opposite scale, the total of both has to be equal to 14.
To Calculate: The equilibrium constant for the given reaction