Solve Fe(NH4)2(SO4)2. xH2O: Calculate Moles of Iron & Sulfate

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Discussion Overview

The discussion revolves around a chemistry problem involving the calculation of moles of sulfate and iron in the compound Fe(NH4)2(SO4)2. xH2O, based on experimental data from a sample that was treated with BaCl2 to precipitate BaSO4. The scope includes mathematical reasoning and problem-solving related to stoichiometry.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant requests assistance in calculating the moles of sulfate and iron from a given mass of the compound, mentioning specific experimental results.
  • Another participant notes that the original poster has asked the same question on another forum and implies that they should not expect a complete solution.
  • A different participant claims that the hints provided on the other forum were incorrect, suggesting a misunderstanding of the problem.
  • Conversely, another participant defends the hints as being accurate, indicating a disagreement about the quality of the guidance received.

Areas of Agreement / Disagreement

There is no consensus on the correctness of the hints provided in response to the original question, with participants expressing conflicting views on their validity.

Contextual Notes

Participants have not reached a resolution regarding the calculations or the hints provided, and there is uncertainty about the appropriateness of the guidance received from other sources.

CSG18
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Hi, I would be very grateful if anyone could show me how to answer the following question:

The value of x in Fe(NH4)2(SO4)2. xH2 O can be found by determining the amount in moles of sulfate in the compound.
A 0.982g sample was dissolved in water and excess BaCl2 (aq) was added.
The precipitate of BaSO4 was separated and dried and found to weigh 1.17g.

(a) Calculate the amount, in moles, of sulfate in the 0.982g sample of Fe(NH4)2(SO4)2. xH2O

(according the the answers it's 0.00501 which I do not understand)

(b) Calculate the amount, in moles, of iron in the 0.982g sample of Fe(NH4)2(SO4)2. xH2O

(apparently the answer is 0.00250 which is half of the previous answer - why?!)

Thanks in advance.
 
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You have asked the same question at CF and you were already given hints there, nobody is going to solve the question for you.
 
Borek said:
You have asked the same question at CF and you were already given hints there, nobody is going to solve the question for you.

The hints were wrong though. Its ok though, I understand it now.
 
CSG18 said:
The hints were wrong though.

They were perfect.
 

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