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Topic: stoichiometry  (Read 6453 times)

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gayathri1989

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stoichiometry
« on: March 05, 2005, 12:21:01 PM »
how to balance a equation of dispropotionate reaction in acid and basic medium
« Last Edit: March 08, 2005, 05:41:24 PM by geodome »
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Offline Mitch

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Re:stiocheometry
« Reply #1 on: March 05, 2005, 01:19:05 PM »
give an example  ::)
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gayathri1989

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Re:stiocheometry
« Reply #2 on: March 06, 2005, 04:34:30 AM »
hello
   the ex for balancing the reaction is
            P4 + OH- + H2O=PH3 + H2PO2-
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Offline Donaldson Tan

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Re:stiocheometry
« Reply #3 on: March 07, 2005, 06:32:42 PM »
in dispropornation, the same species undergo oxidation and reduction. so u would need a half equation for oxidation of this species, and another half-equation for the reduction of the same species. then, you combine both half equations together.
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gayathri1989

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Re:stiocheometry
« Reply #4 on: March 08, 2005, 12:19:05 AM »
sir
  thank you for the reply but can you please explain
it by solving any the given equation as i didnt get it
i would be happy if you can explain me step wise
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Offline Donaldson Tan

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re: stoichiometry
« Reply #5 on: March 08, 2005, 05:50:05 PM »
identify the two half-equations:
1. P4 -> PH3 (reduction)
2. P4 -> H2PO2- (oxidation)

next either work out the half reaction or search up textbooks and internet for standard half equations involving reactants and products from the two equations above.
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"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006
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