NATS 1870 Lecture Notes - Lecture 6: Hydronium, Patina, Magnesium Oxide
19 Nov 2014
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Document Summary
A special class of dyes that change color depending on the acidity of the solution. Also referred to as redox reactions - involves a transfer of electrons. Both redox and acid base reactions are referred to as equilibrium reactions. Example: when magnesium is exposed to air, it goes black. Each magnesium atom loses 2 electrons and becomes mg2+ Each oxygen atoms then gains 2 electrons, and becomes o2- Reaction where a substance gains electrons is called reduction. Reaction where a substance loses electrons is called oxidation. Another example - production of copper patina: 4cu (4 atoms of copper) + o2 (oxygen)
