Question

Вычислите массу кислоты затраченную на образование уксусноэтилового эфира массой 70,4 г если массовая доля продукта составляет 80%

Answer 1

C2H5OH+CH3COOH=CH3COOH5C2+H2O
n  CH3COOH5C2=70.4/88.11= 0.799 моль
n CH3COOH=0.99875 моль
m CH3COOH=0.99875*60=59.9 г

Answer 2

Calculation of the Mass of Acid Used to Form Acetic Ethyl Ester

To calculate the mass of acid used to form acetic ethyl ester, we need to know the mass of the ester and the mass fraction of the product.

Given: - Mass of acetic ethyl ester = 70.4 g - Mass fraction of the product = 80%

To find the mass of acid used, we can use the following formula:

Mass of acid used = (Mass of ester) / (Mass fraction of the product)

Substituting the given values into the formula, we get:

Mass of acid used = 70.4 g / 0.8

Calculating this, we find:

Mass of acid used = 88 g

Therefore, the mass of acid used to form the acetic ethyl ester with a mass of 70.4 g and a mass fraction of 80% is 88 g.