What is it?
Definition
An acid is a chemical species that donates protons or hydrogen ions and/or accepts electrons.
Physical Properties
- pH of less than 7
- Sharp-tasting or sour
- Turns litmus paper red
- Dissolves some metals
- Neutralizes bases
Acid classification
References
http://www.barransclass.com/phys1090/hw/hwk_14_acid.html
http://chemistry.about.com/od/chemistryglossary/a/aciddefinition.htm