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1. A lone pair on oxygen of water attacks a carbon in acetic anhydride, forcing one of the bonds in the carbonyl group (of acetic anhydride) to move onto its oxygen (oxygen of carbonyl group). The oxygen now has a negative charge and water is attached to the carbon that was once doubly bonded to oxygen. The water now has a positive charge, making it an oxonium ion.
2. The lone pair of electrons on the negatively charged oxygen (of the former carbonyl group) moves back down, forming a double bond again with carbon.
3. Carbon now has a negative charge so it has to get rid of it by breaking its bond with oxygen (the one in the middle of the anhydride). You now have 2 molecules.
4. The positive charge of water has to also go away so it loses a hydrogen. You now have one molecule of acetic acid.
5. The hydrogen attaches onto the oxygen that was broken away from carbon (but still attached to the carbonyl group of the other untouched carbon). And you now have your second molecule of acetic acid.
So for every mole of acetic anhydride and water, you form 2 moles of acetic acid.
It may be hard to understand this but i have a link for you if you are still confused.
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Chemical reaction of hydrolysis of acetic anhydride?
Acetic anhydride undergoes hydrolysis in the presence of water to form acetic acid and a byproduct, typically a carboxylic acid or alcohol. The reaction is a typical nucleophilic acyl substitution reaction, where water acts as a nucleophile attacking the acetic anhydride to break the anhydride bond and form acetic acid.
What happen when ethanoic acid is heated with p2o5?
When ethanoic acid is heated with P2O5, it will undergo dehydration reaction to form acetic anhydride. The P2O5 serves as a dehydrating agent by removing water molecules from the ethanoic acid molecule, resulting in the formation of acetic anhydride.
What is sodium acetate made?
Sodium acetate is typically produced by the reaction of acetic acid with sodium hydroxide or sodium carbonate. This reaction forms sodium acetate and water. The compound can also be obtained from the reaction of sodium hydroxide with acetic anhydride.
How do you get Acetic anhydride?
As an anhydride, It can be prepared by dehydrating its acid, i.e. Acetic acid, by strong dessicant such as Tetraphosphorus decaoxide(P4O10) :P4O10 + 12 CH3COOH ----> 4 H3PO4 + 6(CH3CO)2O
Why is acetic anhydride used in the preparation of perchloric acid?
acetyl chloride and acetic anhydride are more preferred as acetylating agents because they show great reactivity and produced irreversible reactions in the preparation of other acid derivatives. They can serve as intermediates in the conversation of the less reactive carboxylic acids to more reactive classes of compounds.
Chemical reaction of hydrolysis of acetic anhydride?
Acetic anhydride undergoes hydrolysis in the presence of water to form acetic acid and a byproduct, typically a carboxylic acid or alcohol. The reaction is a typical nucleophilic acyl substitution reaction, where water acts as a nucleophile attacking the acetic anhydride to break the anhydride bond and form acetic acid.
In the aspirin synthesis excess acetic anhydride is hydrolyzed by the addition of water which converts the anhydride into acetic acid Write the balanced equation for this reaction?
The reaction is: (CH3CO)2O + H2O = 2 CH3COOH
In the preparation of aspirin water is added to the reaction flask Why?
The formation of aspirin will proceed faster if acetic anhydride is used in place of acetic acid. However, acetic anhydride will hydrolyze in the presence of water to form acetic acid, slowing down the reaction.
What happen when ethanoic acid is heated with p2o5?
When ethanoic acid is heated with P2O5, it will undergo dehydration reaction to form acetic anhydride. The P2O5 serves as a dehydrating agent by removing water molecules from the ethanoic acid molecule, resulting in the formation of acetic anhydride.
What is sodium acetate made?
Sodium acetate is typically produced by the reaction of acetic acid with sodium hydroxide or sodium carbonate. This reaction forms sodium acetate and water. The compound can also be obtained from the reaction of sodium hydroxide with acetic anhydride.
How do you get Acetic anhydride?
As an anhydride, It can be prepared by dehydrating its acid, i.e. Acetic acid, by strong dessicant such as Tetraphosphorus decaoxide(P4O10) :P4O10 + 12 CH3COOH ----> 4 H3PO4 + 6(CH3CO)2O
Why is acetic anhydride used in the preparation of perchloric acid?
acetyl chloride and acetic anhydride are more preferred as acetylating agents because they show great reactivity and produced irreversible reactions in the preparation of other acid derivatives. They can serve as intermediates in the conversation of the less reactive carboxylic acids to more reactive classes of compounds.
What does a anhydride look like?
Anhydrides are often white or colorless solids with a characteristic acrid odor. They are often crystalline at room temperature. One example is acetic anhydride, which is a colorless liquid with a strong, pungent odor.
What reaction would occur if toulene were not completely dry in a reaction between maleic anhydride and dimethylbutadiene?
If toluene were not completely dry in a reaction between maleic anhydride and dimethylbutadiene, water could react with maleic anhydride instead of dimethylbutadiene, forming maleic acid. This would lead to undesired side products and potentially reduce the yield of the intended reaction. It is important to ensure dry conditions to favor the desired Diels-Alder reaction between maleic anhydride and dimethylbutadiene.
What is the mechanism involved in Liebermann- Burchard test?
When conc. sulfuric acid is added to cholesterol, a water molecule is removed from C3 of cholesterol molecule, and it is oxidised to form3,5-cholestadiene.This product is converted to a polymer containing a chromophore which results in the green colouration indicating a positive test.
What is the reaction between hydrogen peroxide and acetic acid?
The reaction between hydrogen peroxide and acetic acid produces water and oxygen gas as products. This reaction is known as a decomposition reaction.
What is the catalyst when making aspirin?
I searched for this mechanism for along time & I finally found it at this site:http://www.bioportfolio.com/search/reaction_mechanism_for_salicylic_acid_acetic_anhydride.htmlat this site under the category of:synthesis of aspirinthe file that will be downloaded contains the mechanismhope I could helped you...
