CH4->CH3CL->CH3OH->HCHO->HCOOH->HCOONa
Answers
Answer:
Please elaborate the question properly.
Answer:
CH4 -> CH3Cl -> CH3OH -> HCOH -> HCOOH to carry out a chain of transformations
MaxMax asked 3 years ago
Write the reaction equations with which you can carry out the chain of conversions
CH4 -> CH3Cl -> CH3OH -> HCOH -> HCOOH.
Indicate the basic physical and chemical properties of formic acid. Give methods for obtaining this compound.
Tags: methane , methanol , formic acid , formic aldehyde , Chemical transformations , chloromethane
1 answer
XumukXumuk replied 3 years ago
Transformation chain:
CH4 -> CH3Cl -> CH3OH -> HCOH -> HCOOH.
As a result of the radical substitution reaction occurring between methane and chlorine in the light or under the influence of UV radiation, chloromethane is formed:
\ [CH_4 + Cl_2 \ rightarrow CH_3Cl + HCl. \]
Chloromethane react with an aqueous solution of sodium hydroxide leads to the formation of methyl alcohol:
\ [CH_3OH + NaOH \ rightarrow CH_3OH + NaCl. \]
Oxidation of methanol with hot copper (II) oxide allows to obtain formic aldehyde:
\ [CH_3OH + CuO \ rightarrow HCOH + Cu + H_2O. \]
Formaldehyde reacts with a “silver mirror”, being oxidized to formic acid:
\ [HCOH + Ag_2O \ rightarrow HCOOH + 2Ag. \]
Formic (methane) acid accounts for up to 70% of the content of the poisonous gland of a red ant. In the metabolism of living organisms, it is the final product of methane oxidation, therefore, it is present in small amounts in sweat and urine of animals. It is a caustic volatile liquid with a pungent unpleasant odor, which if burned on the skin causes burns. It mixes with water in any proportions, however, in an aqueous solution, this acid is a rather weak electrolyte.
The chemical properties of formic acid are primarily determined by the structural features of its molecule. In an aqueous solution, it dissociates into ions:
\ [HCOOH \ rightarrow H ^ {+} + COO ^ {-}. \]
Due to the presence of an ion in water, H ^ {+}it has a sour taste, is able to change the color of indicators and conduct electric current.
Formic acid has chemical properties characteristic of inorganic acid solutions, i.e. interacts with metals, their oxides, hydroxides and weak salts.
\ [2HCOOH + 2Na \ rightarrow 2HCOONa + H_2; \]
\ [2HCOOH + Na_2O \ rightarrow 2HCOONa + H_2O; \]
\ [HCOOH + NaOH \ rightarrow HCOONa + H_2O; \]
\ [2HCOOH + NaHCO_3 \ rightarrow HCOONa + CO_2 + H_2O; \]
A specific property of formic acid is its ability to interact with alcohols:
\ [HCOOH + CH_3OH \ rightarrow HC (O) O-CH_3 + H_2O. \]