Answer:
The pH scale is a measure of how much Hydrogen ion [H+] is in a solution. The scale extends from 0-14; pH ranges between 0-6 are acidic solutions, 8-14 are basic, and a pH of 7 is neutral.
An acid can be defined as a proton donor, a chemical that increases the concentration of hydronium ions in solution.
acid: generates [H+] in solution
acid: anything that donates a [H+] (proton donor)
acid: accepts an electron pair