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| AUFBAU1 [METALS: EXTRACTION of COPPER] |
 | | Furthermore, copper and many of its compounds show catalytic activity [e.g., copper(II) oxide is used as a catalyst in the manufacture of methanol, and several copper-containing enzymes are involved in photosynthesis and in respiration]. |
 | | When this solution is electrolyzed, the cathodic reaction always results in copper being deposited, but the anodic reaction is dependent on the conductor acting as the anode: aqueous copper(II) ions are formed using a copper anode (Cell 1), whereas oxygen gas is evolved using either a platinum or carbon-graphite anode (Cell 2). |
 | | Copper is used extensively in water piping, alloys, electroplating, and in electrical wiring. |
| www.wissensdrang.com /auf1cu1.htm (595 words) |
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