DEFINITION OF ACIDS AND BASES

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DEFINITION OF ACIDS AND BASES

• Christina Jordan

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ACIDS AND BASES

• There are two ways to identify an acid and a
  base
• Brønsted-Lowry and,
• Arrhenius

ACID BASE
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ARRHENIUS
The Arrhenius definition for both acids, and
bases were founded by Svante Arrhenius. Arrhenius
was a Swedish, scientist, physicist, and chemist.
According to Arrhenius, an acid is a solution
which dissociates into H, or hydronium (H3O)
ions.
Example HCl
? Acids taste sour!
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ARRHENIUS

According to Arrhenius, a base is a solution that
dissociates into hydroxide (OH-) ions.
? Bases taste bitter!
Example NaOH
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ACIDS BRØNSTED-LOWRY
According to brønsted-lowry, an acid is a
hydrogen donor. This means that in a chemical
reaction, the acid will lose a hydrogen ion.
HNO3(aq) H20(aq) ? H30(aq) NO3(aq)
ACID 1 BASE 1
ACID 2 BASE 3
acid base ? conjugate acid conjugate base
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BASES BRØNSTED-LOWRY
According to brønsted-lowry, a base is a hydrogen
acceptor. This means that in a chemical reaction,
it will gain a hydrogen ion.
NH3(aq) H2O(l) ? NH4(aq) OH-(aq)
Base 1 Acid 1 Acid 2
Base 2
base acid ? conjugate acid conjugate base
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Amphiprotic Substances
When dealing with acids and bases, amphiprotic
substances are often included. Amphiprotic
substance can act like either an acid or a base.
An example would be water.
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WORKS CITED
Therrien, Eric. Chemistry 12. Auburn Drive High
School. Acid-base reaction. Wikipedia. Online.
December 14, 2009. http//en.wikipedia.org/wiki/A
cidE28093base_reaction