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Chem Catalyst

Chem Catalyst. Determine what is being oxidized and what is being reduced in the following reaction: CuO + H 2  Cu + H 2 O. Today’s Agenda:. Do Now Notes- Writing half reactions HW: Practice Worksheet. Half Reactions:. Show only oxidation or reduction

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Chem Catalyst

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  1. Chem Catalyst Determine what is being oxidized and what is being reduced in the following reaction: CuO + H2  Cu + H2O

  2. Today’s Agenda: • Do Now • Notes- Writing half reactions • HW: Practice Worksheet

  3. Half Reactions: • Show only oxidation or reduction • Include electrons gained or lost to balance charges • Losing electrons (oxidation): electrons appear as a product • Gaining electrons (reduction): electrons appear as a reactant

  4. Half Reactions: • Add electrons to the following half reactions. Al  Al3+ S2-  S Cl  Cl- Sr  Sr2+

  5. Voltaic cell • Consists of 2 half-reactions • Cathode: where reduction occurs (RED CAT) • Anode: where oxidation occurs • Electrons flow from anode to cathode (electric current)

  6. Voltaic cell

  7. Cu/Zn Redox Reaction • Occurs spontaneously • E- flow from Zn to Cu • This flow of electrons creates an electrical current • http://www.youtube.com/watch?v=V7fS1QofMqI

  8. Voltaic Cell Summary: • Electrons are given off when zinc is oxidized (anode) • E- pass through wire to copper • Copper is reduced (cathode) • Ions move across salt bridge http://www.youtube.com/watch?v=nNG5PMlHSoA&feature=related

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