1. H+
Acids and Bases
OH-

2. Acids and Bases: What are they?
An acid is a material that can release a proton or Hydrogen ion (H+)
A base is a material that can donate hydroxide ion (OH-)
Brondsted & Lowry: An acid is a proton donor and a base is a proton acceptor

3. Properties of Acids
Acids release hydrogen ion into water (aqueous) solution
Formulas for acids usually begins with the ionizable hydrogen Ex: hydrochloric acid: HCl
Acids have a pH less than 7
Acids turn blue litmus red
Litmus paper is the oldest pH indicator

4. Properties of Acids Acids corrode active metals Acids taste sour
Ex: Stomach acid, acetic acid in vinegar, phosphoric acid in coke, citrus fruits such as lemons, oranges, grapefruit
Strong acids (acids that ionize completely) conduct electricity
Weak acids (acids that partially ionize) are poor conductors of electricity

5. Properties of bases Bases release a hydroxide ion into water solution
Bases neutralize acids in a neutralization reaction
Bases turn red litmus paper blue
Have a ph greater than 7

6. Properties of Bases Bases denature protein
This is why bases feel “slippery” on your hands
Strong bases that dissolve in water are very dangerous to humans because a great amount of the structural material of humans is protein
Bases taste bitter
Examples of Bases: household cleaning products such as soap, detergent, ammonia
Bases can help neutralize acidity in your stomach therefore helping with your upset stomach

7. Neutral substance
Has a pH of a 7
Example: Water (H2O)

8. pH Scale

9. Acids and Bases http://www.youtube.com/watch?v=RF40cI2O16U
Watch the video found on the above link and take notes. Information presented will also be used on quiz and test.