Giving the IUPAC name for Al2(Cr2O7)3 ?

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Discussion Overview

The discussion centers around determining the IUPAC names for the compounds Al2(Cr2O7)3 and As2S3. Participants explore the naming conventions and oxidation states involved in these chemical formulas, with a focus on both theoretical understanding and practical application in a homework context.

Discussion Character

  • Homework-related
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant expresses uncertainty about naming Al2(Cr2O7)3 and seeks guidance on how to derive the IUPAC name.
  • Another participant suggests that the IUPAC name for Al2(Cr2O7)3 is aluminum dichromate, based on the oxidation states of aluminum and dichromate ions.
  • A participant questions the reasoning behind the oxidation states of sulfur and arsenic in As2S3, asking how sulfur is determined to be in a -2 state and arsenic in a +3 state.
  • There is a suggestion that As2S3 could be named either arsenic trisulfide or arsenic (III) trisulfide, depending on the context of the oxidation state notation.
  • A link to an external resource is provided to help clarify oxidation states.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the naming of As2S3, as one participant seeks clarification on the oxidation states while another provides a potential name. The discussion remains unresolved regarding the complete understanding of the naming conventions.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about oxidation states and the lack of detailed explanations for the naming conventions. The participants do not fully resolve the mathematical or conceptual steps involved in determining the IUPAC names.

Who May Find This Useful

This discussion may be useful for students learning about chemical nomenclature, particularly in the context of inorganic chemistry and oxidation states.

nukeman
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Homework Statement



I don't understand how to do this. There is 2 of them I am not sure of?

1st: As2S3 - Is the correct IUPAC name: DiAresenic Trisulfide?

2nd: Al2(Cr2O7)3 - IS it DiAluminum ... Need help with this. How do you get the IUPAC name from this. Any help would be great!



Homework Equations





The Attempt at a Solution

 
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1. Since we know sulfur is in a -2 oxidation state, that means arsenic is +3. So you could call it either arsenic trisulfide or arsenic (III) trisulfide.

2. Aluminum is always +3, and dichromate is always -2, so the name is aluminum dichromate.
 
I am still having trouble with As2S3

How do we know sulfur is in a -2 oxidation state? And how does Arsenic get a +3

How does that turn into Arsenic Trisulfide?

Really appreciate help on this! Thanks.
 

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