March 29, 2024, 07:08:48 AM
Forum Rules: Read This Before Posting


Topic: Mole Fraction of Iron  (Read 954 times)

0 Members and 1 Guest are viewing this topic.

Offline kamilast

  • New Member
  • **
  • Posts: 8
  • Mole Snacks: +0/-0
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

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27634
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
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?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline kamilast

  • New Member
  • **
  • Posts: 8
  • Mole Snacks: +0/-0
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

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27634
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
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)?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline kamilast

  • New Member
  • **
  • Posts: 8
  • Mole Snacks: +0/-0
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

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27634
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Mole Fraction of Iron
« Reply #5 on: November 08, 2020, 05:04:12 PM »
Please post your final solution for others to learn :)
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Sponsored Links