Distinguish Iron (II) Chloride vs Iron (II) Sulfate | Chemistry Homework Help

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SUMMARY

The discussion focuses on distinguishing between iron(II) chloride and iron(II) sulfate in dilute solutions. Both compounds exhibit similar colors and form a white precipitate when tested for anions. To differentiate them, one can perform a chloride test using silver nitrate, which will yield a white precipitate of silver chloride for iron(II) chloride, while iron(II) sulfate will not react. Additionally, the addition of ammonia to both iron(II) and iron(III) salts results in similar outcomes as the sodium hydroxide test, indicating the presence of Fe2+ and Fe3+ ions.

PREREQUISITES
  • Understanding of chemical tests for anions, specifically chloride and sulfate.
  • Knowledge of precipitation reactions involving silver nitrate.
  • Familiarity with the behavior of iron(II) and iron(III) ions in solution.
  • Basic principles of complex ion formation with ammonia.
NEXT STEPS
  • Research the procedure for conducting a chloride test using silver nitrate.
  • Study the characteristics of iron(II) and iron(III) ions in aqueous solutions.
  • Learn about the formation of precipitates in chemical reactions.
  • Explore the effects of ammonia on metal ions in solution.
USEFUL FOR

Chemistry students, educators, and anyone involved in laboratory analysis of metal ions and their compounds.

Elizabeth12
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Hi

I need help with my chemistry homework. I'm stuck on the following questions

1. Very dilute solutions of iron(II) chlodie and iron (II) sulfate have similar colours. Explain how you can distinguish solutions of these compounds. Give full details of the tests you can carry out as well as the experted results.

I understand this question, but I can't find any other way to distinguish the two solutions other than the test for anions, which the test results for both are the same. ( both form a white precipitate)

2. Explain why addition of ammonia to iron(II) and iron (III) salts gives the same results as in the test of Fe 2+ and Fe 3+ using aqueous sodium hydroxide.

The effect is the same...but why though?

Please help me answer these questions a.s.a.p because the homework is due tomorrow! thank you!
 
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Elizabeth12 said:
I understand this question, but I can't find any other way to distinguish the two solutions other than the test for anions, which the test results for both are the same. ( both form a white precipitate)

How do you test for chlorides? How do you test for sulfates?

Explain why addition of ammonia to iron(II) and iron (III) salts gives the same results as in the test of Fe 2+ and Fe 3+ using aqueous sodium hydroxide.

What happens when you add ammonia or hydroxide?
 

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