Chemistry Ch 20 Content

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Henri93
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261533
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Chemistry Ch 20 Content
Updated:
2014-02-11 21:37:52
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Chemistry 20 Content
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Chemistry Ch 20 Content
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  1. If an atom is reduced in a redox reaction then
    another atom in the system must be oxidized
  2. ______ is another name for an oxidation-reduction reaction
    redox
  3. Electrons are ______ in reduction reaction and ______ in oxidation reactions
    • gained
    • lost
  4. Electrons are ______ in an oxidation-reduction reaction
    transfered
  5. Cu ↣ Cu+2 + 2e- is a ______ reaction
    oxidation
  6. in 2Na + 2H2O ⇨ 2NaOH + H2 and 

    2Na + S ⇨ Na2S what is Na
    Na is the reducing agent
  7. in CH4+ 2O2⇨ CO2+ H2O
    O2 is what?
    O2 is the oxidizing agent
  8. the oxidation number of hydrogen when it is in a compound other than hydride is _____.
    +1
  9. the oxidation number of bromine in bromine gas is _____.
    0
  10. The oxidation number for each atom in 
    NH4Cl
    • N = -3
    • H = +1
    • Cl = -1
  11. the charge of an atom would have in a compound if its bonding electrons were assigned to the more electronegative atom
    Oxidation number
  12. What is Cr's oxidation number in
    K2Cr2O7 + H2O + S ⇨ KOH + Cr2O3 + SO4
    -3
  13. In H2O + Cl2 + SO2 ⇨ HCl + H2SO4
    what is reduced?
    Cl atom is reduced
  14. In HNO3 + HBr ⇨ NO + Br2 + H2O

    what is oxidized?
    The Br atom is oxidized
  15. _______ reactions include many single replacement reactions, combination reactions, decomposition reactions, and combustion reactions
    Redox
  16. Ionic reactions are best balanced by _____
    the half reaction method

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