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An oxidizing agent is something that removes one or more electrons from something itself (the oxidizing agent itself gains one or more electrons).

A reducing agent is something that gives electrons to something else (the reducing agent itself looses electrons).

A catalyst is something that speeds up a reaction although the catalyst is not consumed itself in the reaction. The catalyst does this by lowering the activation energy of the reaction.

See the Related Questions to the left for more information about oxidation and reduction reactions and catalysts.

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17y ago
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6mo ago

An oxidizing agent is a substance that causes oxidation by accepting electrons in a chemical reaction. A reducing agent is a substance that causes reduction by donating electrons in a chemical reaction. A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

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Q: What is an oxidising agent and a reducing agent and a catalyst?
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Is hypo is an oxidising agent or reducing agent in photography?

Hypo is a reducing agent when combined with Na.


Is gold a reducing agent or a oxidising agent?

Gold is a reducing agent because it tends to lose electrons and undergo reduction reactions, in which it reduces other substances by donating electrons.


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No, iodide (I-) is a reducing agent, not an oxidizing agent. It tends to be oxidized to iodine (I2), gaining electrons in a chemical reaction.


What is used to test for reducing and oxidising agents?

One common test for reducing agents is the Benedict's test, which detects the presence of reducing sugars by forming a colored precipitate. The iodine test is often used to test for starch, which is not strictly a reducing agent, but it can give an indication of the presence of polysaccharides that may contain reducing sugar units. A common test for oxidising agents is the potassium permanganate test, where the purple color of the permanganate solution fades as it is reduced by the oxidising agent.


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Is citric acid oxidising agent or reducing agent?

Citric acid is neither an oxidizing agent nor a reducing agent. It is a weak organic acid commonly found in citrus fruits and is used as a flavoring and preservative in various food and beverage products.