Question

Составьте уравнение реакций, протекающих по схеме: крахмал->- глюкоза-»-этанол-»-оксид углерода (IV)-—>-крахмал.

Answer 1

(C6H10O5)n + n H2O=n C6H12O6

  C6H12O6 = 2C2H5OH+2CO2 -спиртовое бродение

  C2H5OH+ 3O2=2CO2+ 3H2O 

nCO2+ nH2O=  (C6H10O5)n 

 n (C6H10O5)= 243/162= 1.5 моль

 n(CO2)=2n(C6H10O5) -по уравнению реакции

V(CO2)=3*22.4=67.2 л ответ

Answer 2

(C6H10O5)n + n H2O=n C6H12O6

C6H12O6 = 2C2H5OH+2CO2 -спиртовое бродение

C2H5OH+ 3O2=2CO2+ 3H2O

nCO2+ nH2O= (C6H10O5)n

n (C6H10O5)= 243/162= 1.5 моль

n(CO2)=2n(C6H10O5) -по уравнению реакции

V(CO2)=3*22.4=67.2 л ответ

Answer 3

Formulating the Reaction Equation

To formulate the reaction equation for the given scheme: крахмал -> глюкоза -> этанол -> оксид углерода (IV) -> крахмал, we need to consider the chemical processes involved in each step.

1. Conversion of Starch (крахмал) to Glucose (глюкоза): - This process involves the breakdown of starch into glucose, which is a hydrolysis reaction catalyzed by enzymes. - The chemical equation for this process is: Starch (C6H10O5)n -> Glucose (C6H12O6).

2. Fermentation of Glucose to Ethanol: - The fermentation of glucose to ethanol is a biochemical process carried out by yeast or bacteria under anaerobic conditions. - The chemical equation for this process is: Glucose (C6H12O6) -> Ethanol (C2H5OH) + Carbon Dioxide (CO2).

3. Oxidation of Ethanol to Carbon Dioxide: - The oxidation of ethanol to carbon dioxide is a combustion reaction that involves the reaction of ethanol with oxygen to produce carbon dioxide and water. - The chemical equation for this process is: Ethanol (C2H5OH) + Oxygen (O2) -> Carbon Dioxide (CO2) + Water (H2O).

4. Conversion of Carbon Dioxide to Starch: - This process involves the conversion of carbon dioxide to starch through photosynthesis in plants. - The chemical equation for this process is the reverse of the first step: Carbon Dioxide (CO2) + Water (H2O) + Light Energy -> Starch (C6H10O5)n + Oxygen (O2).

Overall Reaction Equation

Combining these individual steps, the overall reaction equation for the given scheme is:

Starch (C6H10O5)n -> Glucose (C6H12O6) -> Ethanol (C2H5OH) + Carbon Dioxide (CO2) -> Carbon Dioxide (CO2) + Water (H2O) + Light Energy -> Starch (C6H10O5)n + Oxygen (O2)

This represents the cyclic process of starch being converted to glucose, then to ethanol and carbon dioxide, and finally back to starch through photosynthesis.