Question

What is an example of how resonance affects the equilibrium the strength of an acid?

Answer 1

Hint: In chemistry resonance can be defined as a way of describing bonding in certain molecules or ions by the combination of different contributing structures and the structures formed during the process of resonance are known as resonating or
canonical structures.

Complete answer:
Resonance effect is also known by the name mesomeric effect. Resonance effect is generally studied in organic chemistry which describes the change in the behavior of electrons when the elements other than that of the carbon atoms and hydrogen takes part in the formation of molecular bonds.
Resonance affects the equilibrium of the strength of an acid or we can say it generally increases the strength of an acid with an increase in resonance effect this can be described by taking the example of phenols as compared to alcohols.
Phenol is relatively strong acid as compared to other alcohols this can be explained on the basis of resonance effect. Phenol dissociates into water and forms the phenolate anion where we know that anion is that ion which carries negative charge and phenol is able to distribute the negative charge around the molecule due to its resonance structure which makes it more stable.
Hence we can say that the resonance effect helps to attain equilibrium at an earlier stage or increase the strength of an acid.

Note:
Resonance or Mesomerism describes the delocalized electrons within the certain molecules where one single lewis structure does not express the bonds. An ion or molecule with these delocalized electrons can be represented by a number of structures which are called resonance structures.