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#Post#: 449--------------------------------------------------
Problem of the week-29/7/12
DIR By: Michel
Date: July 29, 2012, 5:55 am
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5.88g of a compound of Fe, X reacted completely with 2.13g of
Chlorine to produce 7.16g of a Chlorocomplex, Y and 0.84g of a
toxic colorless gas, Z.
In the equation of this reaction, 1mole of each reactant combine
to form 1 mole of each product
The chlorocomplex produced was then decomposed by heating to
produce
3.81g of FeCl2, and 3.36g of gas Z.
The decomposition of the chlorocomplex takes the format
Y => FeCl2 + 4Z
Identify X, Y and Z.
Hint: Assume all reactions proceeded to completion.
It would be wise to make some guesses and see if the math holds
up.
Good Luck!
#Post#: 450--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: PIRAH SALEEM
Date: July 29, 2012, 1:44 pm
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Y is the complex having atomic mass 238.6 and Z is the colour
less toxic gas having atomic mass 28 I think it would be half of
iron X is iron :-\
#Post#: 451--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: Michel
Date: July 29, 2012, 2:01 pm
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--- Quote from: PIRAH SALEEM link ---
>
> Y is the complex having atomic mass 238.6 and Z is the colour
less toxic gas having atomic mass 28 I think it would be half of
iron X is iron :-\
>
>
--- End Quote ---
You are on the right track, your calculations on the molar
masses are correct.
More hints: Z is a common gas, think of any common toxic gas
with molar mass of 28.
#Post#: 452--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: Karwan
Date: July 29, 2012, 9:46 pm
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Sorry I think this is very difficult. ???
#Post#: 456--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: PIRAH SALEEM
Date: July 30, 2012, 1:09 pm
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it may be nitrogen but I don`t know how can it be nitrogen which
is formed from Y which is formed from Fe and chlorine
#Post#: 457--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: Michel
Date: July 30, 2012, 1:16 pm
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--- Quote from: PIRAH SALEEM link ---
>
> it may be nitrogen but I don`t know how can it be nitrogen
which is formed from Y which is formed from Fe and chlorine
>
--- End Quote ---
Z is toxic, It's not N2
Try another guess :)
It's relatively common
#Post#: 458--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: PIRAH SALEEM
Date: July 30, 2012, 1:18 pm
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silicon ???
#Post#: 459--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: Michel
Date: July 30, 2012, 5:54 pm
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Si is solid at room temperature. Z is a gas at room temperature.
#Post#: 462--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: PIRAH SALEEM
Date: July 31, 2012, 1:15 pm
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Is it from transition metals??
#Post#: 465--------------------------------------------------
Re: Problem of the week-29/7/12
DIR By: Michel
Date: August 1, 2012, 4:57 am
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--- Quote from: PIRAH SALEEM link ---
>
> Is it from transition metals??
>
--- End Quote ---
No.
I'm still waiting for someone to guess what Z might be. a common
toxic gas with molar mass of ~28.0g/mol. C'mon it's an easy
guess!
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