Pyridine (c5h5n) is a particularly foul-smelling substance used in manufacturing pesticides and plastic resins. calculate the ph of a 0.135 m solution of pyridine (kb = 1.4×10-9 ). 

pOH of the given 0.135M solution of Pyridine is 9.137

Explanation: Pyridine is a weak base and during its hydrolysis, pyridine forms pyridinium ion and releases hydroxide ions. Reaction follows:

at                0.135M                     0               0

at               0.135-x                     x                x

can be written as:

On solving the quadratic equation, we get

Negative value is neglected, as it is concentration and concentration cannot be in negative.

Therefore,

pOH can be calculated as:

pOH = 4.863

pH can be calculated by:

pH = 9.137

the right answer is c i just did the question.