Q1: What are the main two common uses for Pentetic Acid and Ethylenediaminetetraacetic acid?
Pentetic acid:  The molecule can be viewed as an expanded version of EDTA and is used similarly. Ethylenediaminetetraacetic acid: Ethylenediaminetetraacetic acid (EDTA), also known by several other names, is a chemical used for both industrial and medical purposes.
industrial and medical purposes.