Removing impurities using Na2CO3

  • Thread starter jsmith613
  • Start date
  • Tags
    Impurities
In summary, the conversation discusses the use of Na2CO3 to remove excess acid and the reaction between SO2 and a basic solution. It is explained that bromine, a strong oxidizing agent, can easily oxidize sulfite to something more stable. The conditions for this reaction are acidic, but it is mentioned that the conversation is regarding the purification of a distilled product, which may have been separated from the acid. It is concluded that sodium carbonate is the base in this reaction.
  • #1
jsmith613
614
0

Homework Statement



attachment.php?attachmentid=152542&d=1338376811.png


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?
 
Physics news on Phys.org
  • #2
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.
 
  • #3
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?
 
  • #4
During reaction, but we are talking about purification of a distilled product, don't we?
 
  • #5
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?
 

1. How does Na2CO3 remove impurities?

Na2CO3, also known as sodium carbonate, is a strong base that can react with acidic impurities in a solution. The bicarbonate ions in Na2CO3 react with hydrogen ions from the acidic impurities, forming water and carbon dioxide gas. This reaction helps to neutralize the solution and remove impurities.

2. What types of impurities can be removed with Na2CO3?

Na2CO3 is commonly used to remove acidic impurities such as hydrogen sulfide, carbon dioxide, and other organic acids. It can also remove heavy metal ions, such as copper and lead, by forming insoluble carbonates.

3. What is the process for removing impurities using Na2CO3?

The process for removing impurities using Na2CO3 involves adding a calculated amount of the compound to the solution containing impurities. The solution is then stirred to allow the Na2CO3 to react with the impurities. The resulting precipitate can be filtered out, leaving a purified solution.

4. Can Na2CO3 be used to remove impurities from any solution?

No, Na2CO3 is most effective for removing impurities in acidic solutions. It may not be as effective for removing impurities in neutral or basic solutions. Additionally, the type of impurities present may affect the efficiency of Na2CO3 in removing them.

5. Are there any safety precautions to take when using Na2CO3 for removing impurities?

Yes, Na2CO3 is a corrosive substance and can cause irritation to the skin and eyes. It is important to wear protective gloves and goggles when handling it. It is also recommended to work in a well-ventilated area to avoid inhaling any potential fumes. Proper disposal of the resulting precipitate is also important to prevent environmental contamination.

Similar threads

  • Biology and Chemistry Homework Help
Replies
10
Views
2K
  • Biology and Chemistry Homework Help
Replies
20
Views
2K
  • Biology and Chemistry Homework Help
Replies
3
Views
4K
  • Biology and Chemistry Homework Help
Replies
4
Views
947
  • Biology and Chemistry Homework Help
Replies
4
Views
2K
  • Biology and Chemistry Homework Help
Replies
3
Views
2K
  • Biology and Chemistry Homework Help
Replies
2
Views
1K
  • Biology and Chemistry Homework Help
Replies
8
Views
1K
  • Biology and Chemistry Homework Help
Replies
1
Views
8K
  • Biology and Chemistry Homework Help
Replies
1
Views
3K
Back
Top