Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. it is also a component of cigarette smoke. pyridine ionizes in water as follows: c5h5n+h2o⇌c5h5nh++oh− the pkb of pyridine is 8.75. what is the ph of a 0.335 m solution of pyridine?

Answer : The pH of the solution is, 9.4

Solution :  Given,

Concentration (c) = 0.025 M

Base dissociation constant =

First we have to calculate the value of .

The expression used for the calculation of is,

Now put the value of in this expression, we get:

The given equilibrium reaction is,

initially conc.     0.335                    0                0

At eqm.           (0.335-x)                  x                x

Formula used :

Now put all the given values in this formula ,we get:

By solving the terms, we get:

Now we have to calculate the concentration of hydroxide ion.

Now we have to calculate the pOH.

Now we have to calculate the pH.

Therefore, the pH of the solution is, 9.4

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.