Changing H3PO4 to H3PO3 without P4O6

  • Thread starter Char. Limit
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In summary, the conversation discusses methods for changing phosphoric acid to phosphorous acid using common laboratory materials and the availability of P4O6. The use of an electrochemical cell and an electrolytic reaction are suggested as possible methods. The individual also expresses gratitude for the helpful information.
  • #1
Char. Limit
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Is there any method, using common laboratory materials, to change phosphoric acid (H3PO4) to phosphorous acid (H3PO3)?

Assume that P4O6 is not available for purchase, but methods to make it are welcome.

This is for a culminating project, so not really homework, but I don't know where else to turn. Even my chemistry teacher doesn't know.
 
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  • #2
Just another question:

If H3PO3 is a "reducing agent" and H3PO4 is a by-product of the reduction, can an opposite reaction be carried out to yield H3PO3?
 
  • #3
Does no one om this illustrious forum know?
 
  • #4
You can probably set up an electrochemical cell (using an appropriate oxidation half reaction) to convert the phosphate to phosphite:
http://en.wikipedia.org/wiki/Standard_electrode_potential_(data_page )

(It's about half-way down, search for po4)

EDIT: Or maybe drive the reaction using an electrolytic one.
 
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  • #5
Excellent...

How should I do that, or should I ask my chemistry teacher?

2,718,282 thanks to you.
 

FAQ: Changing H3PO4 to H3PO3 without P4O6

How can H3PO4 be changed to H3PO3 without using P4O6?

There are several methods to change H3PO4 to H3PO3 without using P4O6. One method is through the reduction of H3PO4 using a strong reducing agent such as sodium hypophosphite. Another method is through the reaction of H3PO4 with a metal oxide such as zinc oxide.

Why is it important to avoid using P4O6 in the process of changing H3PO4 to H3PO3?

P4O6 is a toxic and corrosive chemical that can be harmful to both humans and the environment. Therefore, it is important to find alternative methods to change H3PO4 to H3PO3 without using P4O6.

Can H3PO4 be directly converted to H3PO3?

No, H3PO4 cannot be directly converted to H3PO3. This is because H3PO4 and H3PO3 have different chemical compositions and properties, and a chemical reaction is required to convert one to the other.

What is the purpose of changing H3PO4 to H3PO3?

H3PO3 is a phosphorous acid that is commonly used in the production of fertilizers, detergents, and other chemical products. It is also used as a reducing agent in various industrial processes. Therefore, the purpose of changing H3PO4 to H3PO3 is to obtain a more suitable and useful compound for various applications.

Are there any potential hazards or risks associated with changing H3PO4 to H3PO3?

While the process of changing H3PO4 to H3PO3 may involve the use of chemicals and reactions, proper safety precautions should be taken to minimize any potential hazards or risks. This includes wearing appropriate personal protective equipment and following proper handling and disposal procedures for chemicals involved in the process.

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