Find the theoretical oxygen demand for the
followingsolutions?
a. 200mg/l of acetic acid, ch3cooh.
b. 30mg/l of ethanol, c2h5oh.
c. 50mg/l of sucrose c2h12o6.

a) 213.3 mg/L

b) 62.61 mg/L

c) 0.0225 mg/L

Explanation:

Theoretical oxygen demand (ThOD)is essentially the amount of oxygen required for the complete degradation of a given compound into the final oxidized products

a) Given:

Concentration of acetic acid, = 200 mg/L

Based on the reaction stoichiometry:

mass of = 60 g

mass of = 2(32) = 64 g

b) Given:

Concentration of ethanol, = 30 mg/L

Based on the reaction stoichiometry:

mass of = 46 g

mass of = 3(32) = 96 g

c) Given:

Concentration of sucrose, = 50 mg/L

Based on the reaction stoichiometry:

mass of = 342 g

mass of = 12(32) = 384 g