Question

Write the equations to show how lactic fermentation compares with alcoholic fermentation. Which reactant(s) do they have in common?

a) Lactic fermentation: C6H12O6 → 2 C3H6O3 (glucose → lactic acid)
Alcoholic fermentation: C6H12O6 → 2 C2H5OH + 2 CO2 (glucose → ethanol + carbon dioxide)
Both types of fermentation share glucose as a common reactant.
b) Lactic fermentation: CO2 + H2O → C3H6O3 (carbon dioxide + water → lactic acid)
Alcoholic fermentation: CO2 + H2O → C2H5OH (carbon dioxide + water → ethanol)
They both have carbon dioxide and water in common as reactants.
c) Lactic fermentation: C6H12O6 → C2H5OH (glucose → ethanol)
Alcoholic fermentation: C6H12O6 → C3H6O3 (glucose → lactic acid)
They have glucose and ethanol in common as reactants.
d) Lactic fermentation: C6H12O6 + O2 → C3H6O3 (glucose + oxygen → lactic acid)
Alcoholic fermentation: C6H12O6 + O2 → C2H5OH + CO2 (glucose + oxygen → ethanol + carbon dioxide)
They both share oxygen as a common reactant.

Answer 1

Lactic fermentation converts glucose into lactic acid, while alcoholic fermentation converts glucose into ethanol and carbon dioxide; both processes use glucose as a common reactant and are anaerobic.

Step-by-step explanation:

Lactic fermentation and alcoholic fermentation are both anaerobic processes that convert glucose into different products. The correct chemical equations for these fermentation processes are:

• Lactic fermentation: C6H12O6 → 2 C3H6O3 (glucose → lactic acid)
• Alcoholic fermentation: C6H12O6 → 2 C2H5OH + 2 CO2 (glucose → ethanol + carbon dioxide)

Both fermentation types begin with the common reactant of glucose (C6H12O6). No oxygen is involved in the fermentation processes since they are anaerobic. In lactic fermentation, glucose is converted directly into lactic acid, whereas in alcoholic fermentation, glucose is converted into ethanol and carbon dioxide.