303acidbasesalt

303acidbasesalt - Acids, Bases, and Salts Glenn V. Lo...

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    Acids, Bases, and Salts Glenn V. Lo Department of Physical Sciences Nicholls State University
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    What is an acid? Molecular substances that break up  (“dissociate”) and yield H +  ions in water. HCl   H +  + Cl - H 2  2H +  + S 2- Hydrogen ions (H + ) are also called “protons.”  Why? HCl is an example of a  “monoprotic acid”,  H 2 S is an example of “diprotic acid”
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    Strong and weak acids A strong acid is  completely  dissociated in water.   A weak acid is only  partially dissociated.   Which figure on the  right represents a  strong acid?
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    Which acids are strong? There are only six known strong acids. HCl HBr HI H 2 SO 4 HNO 3 HClO 4
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    Strong and weak acids Which figure on the  right best represents HCl HF HC 2 H 3 O 2 HNO 3 HCN
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    What is a base? A base is a compound that yields  hydroxide ions (OH - ) in water.  Metal hydroxides: NaOH, Ca(OH) 2 , etc. NaOH(s) 
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This note was uploaded on 06/11/2009 for the course CHEM 105 taught by Professor Wessel during the Spring '08 term at Nicholls State.

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303acidbasesalt - Acids, Bases, and Salts Glenn V. Lo...

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