Catalysts and Catalysis

What is the catalyst when making aspirin?


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2013-03-22 09:48:24
2013-03-22 09:48:24

You can use 85% phosphoric acid, or concentrated sulfuric acid. It depends on your method, but either works.

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Aspirin is made when salicylic acid and acetic anhydride is reacted in the presence of an acid catalyst such as H2SO4. Acetylsalicylic acid (aspirin) and acetic acid is formed. The reaction is an esterification reaction.

Sulphuric acid is used as a catalyst in the preparation of aspirin.

to serve as a catalyst and speed up the reaction

It is an acid catalyst and a dehydrant. It is also hygroscopic and absorbs water. (Water is released in the synthesis of aspirin)

Salycylic acid and acetic anhydride with a sulphuric acid catalyst

The role of sulphuric acid in the synthesis of aspirin is of a catalyst, and it is also a source of protons for carrying out the esterification of salicylic acid with acetic anhydride.

Concentration of reactant, temperature and surface area like texture. Also if there is a catalyst involved.

Yes. ^ Well to improve on this, in simple terms. A catalyst is something that brings on the reaction, in this case the liquid catalyst can only contain a little amount of water otherwise side reactions will occur and this would impact (reduce) the yield of aspirin - not good, sulfuric acid is usually used because it is 98% pure, phosphoric acid can also be used but it is only about 85% pure, still OK. HCL in its most concentrated form is only 37% pure and there fore no good at all. In a shorter to the point answer, H2SO4 is a pure catalyst which will give you a close to accurate yield of aspirin.

Aspirin is used as a painkiller, an antipyretic (fever-decreasing treatment) and an anticoagulant (making blood less able to form clots).

A catalyst affects a reaction by speeding it up. A catalyst, remember, does not participate as a reactant or product in the reaction. It facilitates the reaction by lowering its activation energy, making the reaction easier to happen.

Activation energy is the energy required by a reaction for the reaction to occur. The catalyst lowers the activation energy, making it easier for the reaction to happen.Improvement:A catalyst don't lowers the activation energy. A catalyst creates a alternative route (*) for the same reaction with a lower activation energy.* = as a result of the interaction of the reagents with the catalyst.

Hcl cl- is a strong nucleophile capible of substituting the oH group of the salicyclic acid,, my best guess

Besides being an analgesic, aspirin thins the blood, making it easier for the stressed heart, or blocked artery, the pass blood.

Aspirin is used as a painkiller, an antipyretic (fever-decreasing treatment) and an anticoagulant (making blood less able to form clots).

Taking the odd aspirin now an then can help your circulation problems as aspirin thins the blood making it easier for blood to travel around the body.

The Haber process (making amonia using nitrogen and hydrogen).

generally a high pressure, a temperature at or above room temperature, and a catalyst

Sulfuric acid acts as a catalyst and dehydrant. It is also serves as a source of protons during the esterification of salicylic acid with acetic anhydride.

It doesn't. Catalysts merely speed reactions along, they do not make them happen - that is the definition of a catalyst. Industrially, catalysts are important in making chemical reactions economically fast.

Aspirin acts as a blood thinner. Thus making the blood less likely to form clots. Clots are what can cause heart attacks and stroke.

Positive Catalyst is a catalyst which increases the rate of reaction. In a wider sense, the term catalyst is used for positive catalyst.

As a common dry lubricant, a catalyst for desulfurization in petroleum refineries, for making transistors.

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