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Oxidation-Reduction               Reactions1. Review the Activity Series we usedwith single replacement reactions2. Oxidat...
Calculating Oxidation Number      The first step in better understanding redox          reactions is the determination of t...
Determine the oxidation  numbers of the following:MnO4-1    NO3-1   H2SO4   AgNO3HClO       NaCl   BaF2    K2Cr2O7
A Few Reactions...Cu(NO3)2 + Ni     Ni(NO3)2 + CuPb + PbO2 + H2SO4         PbSO4 + H2ONa+ H2O       NaOH + H2 1.   Put oxi...
Batteries and Galvanic Cells:Applications of RedoxReactions. •Fuel cells for   cars •Power for   personal   electronic    ...
The Anatomy of a Battery  Do a diagram of a battery made from aluminum and  silver.  1. Electrodes  2. Solutions  3. Salt ...
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Oxidation Reduction Reactions

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  • Transcript of "Oxidation Reduction Reactions"

    1. 1. Oxidation-Reduction Reactions1. Review the Activity Series we usedwith single replacement reactions2. Oxidation is the loss of electrons3. Reduction is the gain of electrons4. The Reducing Agent is oxidized5. The Oxidizing Agent is reduced
    2. 2. Calculating Oxidation Number The first step in better understanding redox reactions is the determination of the oxidation # of each element in a compound. (+2) (+1) (-2) H 2 0 When determining oxidation numbers, look for oxygen (-2) or hydrogen (+1). Group I and II metals are also a good bet (+1 or +2). Halogens like fluorine, chlorine, bromine, and iodine (usually –1) are consistent, especially if paired with a metal.
    3. 3. Determine the oxidation numbers of the following:MnO4-1 NO3-1 H2SO4 AgNO3HClO NaCl BaF2 K2Cr2O7
    4. 4. A Few Reactions...Cu(NO3)2 + Ni Ni(NO3)2 + CuPb + PbO2 + H2SO4 PbSO4 + H2ONa+ H2O NaOH + H2 1. Put oxidation #’s above each element 2. Find the element oxidized (lose electrons) 3. Find the element reduced (gain electrons) Voltaic Cell
    5. 5. Batteries and Galvanic Cells:Applications of RedoxReactions. •Fuel cells for cars •Power for personal electronic Lithium ion batteries devices (cell phones, etc)
    6. 6. The Anatomy of a Battery Do a diagram of a battery made from aluminum and silver. 1. Electrodes 2. Solutions 3. Salt bridge 4. Direction of e- flow 5. Voltage 6. Label anode and cathode, as well as the +/- electrodes Importance of the salt bridge- as Al Al+3 + 3e- …. the electrons leave the anode and go to the cathode. This leaves a buildup of Al+3 ions that could interfere with the flow of electrons to the cathode. The salt bridge allows NO3-1 ions to flow from the cathode to the anode to balance the build up of Al+3.

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