H+ Acids and Bases OH-.

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Presentation transcript:

H+ Acids and Bases OH-

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

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

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

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

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

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

pH Scale

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.