12acids - ACIDS Glenn V Lo Department of Physical Sciences...

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    ACIDS Glenn V. Lo Department of Physical Sciences Nicholls State University
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    Is it an acid? Given the formula of a compound, how can  you tell if it’s an acid? Answer: formulas of acids are  usually  written  with H first. Which of the following are most  likely formulas of acids? HCl H 2 SO 4 CH 4 NH 3
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    What is an acid? Several definitions Sour-tasting substances 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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    Reading formulas of acids Method 1. Read as if the compound is  ionic Name the cation (H +  is “hydrogen”) Name the anion Example: HCl   H +  + Cl - ;   “hydrogen chloride” H 2  2H +  + S 2- ;  “hydrogen sulfide”
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12acids - ACIDS Glenn V Lo Department of Physical Sciences...

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