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Author Topic: Explosivness of some Molecules plus a problem with reaccion  (Read 571 times)

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polucas

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Explosivness of some Molecules plus a problem with reaccion
« on: December 19, 2012, 11:15:58 PM »

Hi i have to problems to solve and I´m not so sure how to do them.
1. Complete the reactions and order them by explosivness (I place my solutions, correct me if Im wrong)
a) 2NH4ClO4 --> Cl2 + N2 + 2O2 + 4H2O
Now to determine the explosivness of this substance, i have to check to reduccion potencials right and calculate the increase of Gibbs free energy(not sure if its called lik that in english)? my problem is that i cant find a potencial reduccion from ClO4- to Cl2, i have found onyl ClO4- to Cl-
b) Mg(ClO4)2 > MgCl2 + 4O2
c) NaClO4 > NaCl + 2O2                 
d) [Fe(H2O)6](ClO4)2 > now here what I dont know is what will get oxidized firstly. Will it be Fe2+ to Fe3+ or Oxigen from O^2- to O2? I´ve check the reduccion potencials (Fe3+ to Fe2+ is 0,77V and O2 to H2o is 1,23V), but i dont know if i have to use te reduccion potencial or the oxidation potencials (-reduccion potencial). Of course, the reacion products are different if Fe gets oxidized or if it doesnt.

2. IF3 + [N(CH3)4]F > ?
i got the quantities of those molecules that reacts (1,84g and 0,93 respectively), but i just dont know what can be the products. I suppose its not redox reaccion, and i think IF5 can be a product but i have no idea if its true.

Please i need the solution pretty fast ^^
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curiouscat

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Re: Explosivness of some Molecules plus a problem with reaccion
« Reply #1 on: December 19, 2012, 11:19:27 PM »

Doesn't the volume expansion by gaseous products have to count somewhere?

e.g, Eq.1 creates 8 molecules of gas.
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polucas

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Re: Explosivness of some Molecules plus a problem with reaccion
« Reply #2 on: December 19, 2012, 11:23:39 PM »

Well now that u tell so, I think its important, but on my degree level they dont ask for that things.

I supose that when more gas is created, then more explosive will be the reaction right?
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curiouscat

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Re: Explosivness of some Molecules plus a problem with reaccion
« Reply #3 on: December 19, 2012, 11:26:57 PM »

I supose that when more gas is created, then more explosive will be the reaction right?

Not sure. Maybe I'm wrong.
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polucas

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Re: Explosivness of some Molecules plus a problem with reaccion
« Reply #4 on: December 19, 2012, 11:28:55 PM »

anyway, if someone knows how to do the second problem, and what potencial i have to check in the first problem (reduction or oxidation potencial), I´d be glad to know that ^^
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polucas

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Re: Explosivness of some Molecules plus a problem with reaccion
« Reply #5 on: December 20, 2012, 12:03:14 AM »

sorry for double post, but i was thinking if the second reaction can give this product: [N(CH3)4]IF4?
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