How Does Na2CO3 Remove Impurities?

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Discussion Overview

The discussion revolves around the role of sodium carbonate (Na2CO3) in removing impurities, particularly in the context of acid-base reactions and the purification of distilled products. Participants explore the chemical interactions involved, including the behavior of acids and oxidizing agents in different conditions.

Discussion Character

  • Homework-related
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions why Na2CO3 is considered effective in removing impurities, specifically in relation to the presence of HBr as the only acid.
  • Another participant notes that SO2 acts as an acid anhydride and discusses its reaction with basic solutions, suggesting that bromine's role as a strong oxidizing agent in alkaline conditions leads to the oxidation of sulfite to a more stable form.
  • A participant raises a concern about the conditions being acidic during the reaction, prompting further clarification.
  • There is a discussion about the context of purification of a distilled product, with a participant suggesting that sodium carbonate acts as a base to separate it from the acid.

Areas of Agreement / Disagreement

Participants express differing views on the conditions and roles of various chemical species involved in the purification process, indicating that multiple competing perspectives remain without a clear consensus.

Contextual Notes

There are unresolved questions regarding the specific conditions of the reactions and the definitions of the terms used, which may affect the understanding of the role of Na2CO3 in this context.

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Homework Statement



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Why is the answer D??

Homework Equations


The Attempt at a Solution


So I know that Na2CO3 is used to remove excess acid but surely only HBr is the acid?
 
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SO2 is an acid anhydride, so there would be nothing strange in the fact it reacts with a basic solution. However, there is more to it. Bromine is a strong oxidizing agent, and in the alkaline solution it can easily oxidize sulfite (known reducing agent) to something much more stable.
 
Borek said:
SO2 is an acid anhydride, so there would be nothing strange in the fact it reacts with a basic solution. However, there is more to it. Bromine is a strong oxidizing agent, and in the alkaline solution it can easily oxidize sulfite (known reducing agent) to something much more stable.

but the conditions are acidic?
 
During reaction, but we are talking about purification of a distilled product, don't we?
 
Borek said:
During reaction, but we are talking about purification of a distilled product, don't we?

oh so it has been separate from acid
and therefore the sodium carbonate is the base? right?
 

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