How does the pH affect the chemical bonding?

Hydrogen ions, or protons, are crucial supplies in various chemical and biological processes. The available level of these supplies, essentially, is what we mean by pH.

"Low pH" corresponds to a very high concentration of protons. "High pH" corresponds to a very low concentration of protons.

pH differences can cause unfolding of proteins due to the amount of hydrogen ions present that can interact with bonds and disrupt the structure of the molecule

Some of her  assignments would be creation of drugs. she is a medical chemist after all so she'd need to have the necessary knowledge to make medicine which can later be sold in a pharmacy