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Topic: Mole Fraction of Iron  (Read 365 times)

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Offline kamilast

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Mole Fraction of Iron
« on: November 08, 2020, 08:59:21 AM »
I am having problem with exercise  which  is : Calculate the mole fraction of iron ions in an 8% aqueous FeCl2 solution. Could somebody tell me  how to solve it ? Im stuck with this exercise for like 3 hours and  I can't figure out what should I do.

Offline Borek

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Re: Mole Fraction of Iron
« Reply #1 on: November 08, 2020, 09:50:15 AM »
Can you list all substances present in the solution?

Lest's say you have 1 kg of the solution - how much of each of these substances is present?
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Offline kamilast

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Re: Mole Fraction of Iron
« Reply #2 on: November 08, 2020, 10:13:24 AM »
My knowledge is not complete in this topic. Well susbstances are water, Fe2+ and 2Cl- (but im not sure about it).

I dont really know how to answer on second question  :(

Offline Borek

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Re: Mole Fraction of Iron
« Reply #3 on: November 08, 2020, 03:57:51 PM »
susbstances are water, Fe2+ and 2Cl-

That's OK.

Quote
I dont really know how to answer on second question  :(

You are told solution is 8% in FeCl2 - how many grams of FeCl2 in 1kg (which is 1000 grams)?
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Offline kamilast

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Re: Mole Fraction of Iron
« Reply #4 on: November 08, 2020, 04:42:09 PM »
i did it by poportion and pobably the answer is that 80grams, nextly I counted quantity of moles in FeCl2 and in H2O well i think that im able to do it by myself thank you!

Offline Borek

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Re: Mole Fraction of Iron
« Reply #5 on: November 08, 2020, 05:04:12 PM »
Please post your final solution for others to learn :)
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