Unit 1 Crib - CHEM 614 Unit 1 Discussion Questions 1) In...

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CHEM 614 Unit 1 Discussion Questions 1) In the reading from Bodner and Pardue there is a checkpoint which asks: Use the phlogiston theory to explain what is observed when a strip of magnesium metal is ignited. Provide this explanation then provide what would likely be Antoine Lavoisier’s response to the phlogiston explanation. 2) Organic chemists often discuss oxidation in terms of the loss of a pair of hydrogen atoms. Ethyl alcohol, CH 3 CH 2 OH, is oxidized to acetaldehyde (ethanone), CH 3 CHO, for example by removing a pair of hydrogen atoms. Show that this reaction obeys the general rule that oxidation is any process in which the oxidation number of an atom increases. CH 3 CH 2 OH b CH 3 CHO + H 2 The carbon in CH 2 OH has an oxidation number = -2 The carbon in CHO has an oxidation number = 0 The oxidation number of Carbon has increased from -2 to 0. Similarly, organic chemists often discuss reduction in terms of the gain of a pair of hydrogen atoms. Ethylene, C 2 H 4 , is reduced when it reacts with H 2 to form ethane, C 2 H 6 . Show that this reaction obeys the general rule that reduction is any process in which the oxidation number of an atom decreases. CH 2 CH 2 + H 2 b C 2 H 6 The carbon atoms in ethylene have an oxidation number = -2 The carbon atoms in ethane have an oxidation number = -3 The oxidation number of the carbon atoms have decreased from -2 to -3. 3)
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Unit 1 Crib - CHEM 614 Unit 1 Discussion Questions 1) In...

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