Dialog using english to show cause and effect

In chemistry, an ester is an organic compound formed by replacing one (or more) hydrogen atoms in a carboxyl group with an organic group (usually denoted by R '). Oxygen acid is an acid whose molecule has an -OH group whose hydrogen (H) can become H + ion.
 
Eka      : Hallo Fauzan
Fauzan : Hi Eka
Eka      : Fauzan, I want to ask you, what is ester?
Fauzan : Ester is a compound with a functional group - COO - in the middle of alkyl, R 'and R'' represents a carbon chain.
Eka      : What happens if I react acetic acid with ethanol in an acid catalyst?
Fauzan : It will produce ethyl acetate (ester) and also water. Ethyl acetate is an example of an ester.
Eka      : Try to explain the ester's reaction?         
Fauzan : The reaction of an alcohol with a carboxylic acid with an acid catalyst is a Fischer method. The esterification reaction involves very slow reversible reactions, but when using mineral acid catalysts such as sulfuric acid (H2SO4) and hydrochloric acid (HCl) equilibrium will be achieved in a short period of time. In the esterification reaction the H⁺ dai H2SO4 ion plays a role in the preparation of the ester and also plays a role in the reverse reaction of the ester hydrolysis. In accordance with the law of mass action, in order to obtain high ester yields the equilibrium should shift towards ester formation. Is it possible that ester manufacture can happen other than what I mentioned?
Eka      : Other than what you mentioned I have studied the preparation of the ester by reacting an acid chloride or an anhydrous acid with alcohol or phenol.
Fauzan : Thank you for your knowledge

Eka      : Equally

 
 
 


Komentar

  1. Unknown29 April 2017 pukul 21.45

    Is there any other substance that can be used as a catalyst

    BalasHapus
    Balasan
    1. Unknown30 April 2017 pukul 20.24

      Absent because sulfuric acid other than acidic is also a strong oxidizing agent and Due to its affinity for water, sulfuric acid can eliminate the largest portion of moisture and wet gases, such as moist air.

      Hapus
  2. Inggi jesika30 April 2017 pukul 19.16

    Why esters are volatile compared with alcohol?

    BalasHapus
    Balasan
    1. Unknown30 April 2017 pukul 20.28

      777/5000
      Because ester properties are flammable and readily mixed with water and alcohol has a high boiling point compared with alkane acid. This is because the alcohol molecules contain lower -OH groups than the polar -OH groups. The chemical properties of the ester are based on a higher boiling point than the alcohol. And based on its structure it can be stated that carboxylic acid is a polar molecule. Carboxylic acid esters with relatively low molecular masses are generally colorless, car-colored and volatile and have odors. While the ester is a high molecular mass of liquid and volatile as well as small in making the rate of ester reaction in its manufacture.

      Hapus
  3. Unknown30 April 2017 pukul 19.42

    hi eka can you explain to me different between ester and eter ? cause we know this two compound is aromatic thanks

    BalasHapus
    Balasan
    1. Unknown30 April 2017 pukul 20.35

      Esters are one of carboxylic acid derivatives. An ester is similar to a carboxylic acid, but its acidic hydrogen has been replaced by an alkyl group. The ester nomenclature is almost identical to the nomenclature of the carboxylic acid, but the name of the acid is replaced by the name of the alkyl while the Ether is an organic compound containing the R-O-R group, with R being either alkyl or aryl. [1] Examples of the most common ether compounds are solvents and diethyl ether anesthetics (ethoxyethane, CH 3 -CH 2 -O-CH 2 -CH 3). Ether is very commonly found in organic chemistry and biochemistry, because it is a connective group in carbohydrate and lignin compounds.

      Hapus
  4. Luluul Maknun30 April 2017 pukul 20.31

    Specify the isomer used in the ester?

    BalasHapus
    Balasan
    1. Unknown30 April 2017 pukul 20.42


      Esters have structural isomer and functional isomer with carboxylic acid. Example of structural isomer and functional isomer of ester for molecular formula C4H8O2 The six structural formulas above have the same molecular formula, ie C4H8O2, but differ from both structural and functional aspects. Thus, the ester and carboxylic acid are functionallyomer of one anothe

      Hapus
  5. Dara Juliana1 Mei 2017 pukul 01.00

    Please, explain to me about Ester is a compound with a functional group - COO - in the middle of alkyl, R 'and R'' represents a carbon chain...?

    BalasHapus
    Balasan
    1. Unknown1 Mei 2017 pukul 04.22

      Esters are carbon compounds containing a COO-functional group attached to two alkyl, R and R 'groups. Esters considered to be derived from alkane compounds are called alkyl alkanoates. It has the general formula CnH2nO2 or R-COO-R '. The IUPAC name of the ester is alkyl alkanoate. Most ester compounds smell good, because it is widely used as fragrances. Esters are prepared from acids and alcohols by esterification reaction in the form of a balanced reaction.

      Hapus

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