Question

Ethanol (C2H5OH), also known as grain alcohol, can be made from the fermentation of sugar (C6H1206).
The unbalanced chemical equation for the reaction is
shown below.
__ C6H1206> __ C2H5OH + __ CO2
Balance the chemical equation and determine the mass
of C2H5OH produced from 750g of C6H1206.

Answer 1

The balanced chemical equation of the fermentation of sugar into alcohol is as follows:

• C6H12O6(aq) → 2C2H5OH (aq) + 2CO2 (g)
• 381.8g of C2H5OH is produced from 750g of C6H1206.

How to balance a chemical equation?

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation is the same.

According to this question, ethanol (C2H5OH), also known as grain alcohol, can be made from the fermentation of sugar (C6H1206).

The balanced equation of the fermentation of sugar into alcohol is as follows:

C6H12O6(aq) → 2C2H5OH (aq) + 2CO2 (g)

Molar mass of C6H1206 = 180g/mol

moles of C6H1206 = 750g/180g/mol

moles of C6H1206 = 4.17 moles

Based on the balanced equation;

1 mole of C6H1206 produces 2 moles of C2H5OH

4.17 moles of C6H1206 will produce 8.3 moles of ethanol.

mass of ethanol = 8.3 moles × 46g/mol = 381.8g

Therefore, 381.8g of C2H5OH is produced from 750g of C6H1206.

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