# What is the mass of propionic acid obtained by oxidation of 25 liters. aldehyde, if the product yield 92%?

March 25, 2021 | education

| Let’s execute the solution:

1. In accordance with the condition of the problem, we compose the equation:

V = 25 HP X g -? W = 92%

Н3С – СН2 – СОН + Ag2O = H3C – CH2 – COOH + 2Ag – oxidation of aldehyde with silver oxide, propionic acid was obtained;

2. Calculation:

M (C3H6O) = 58 g / mol;

M (C3H6O2) = 74 g / mol.

3. Determine the amount of starting material and product:

1 mol of gas at normal level – 22.4 liters;

X mol (С3Н6О) -25 l. hence, X mol (C3H6O) = 1 * 25 / 22.4 = 1.12 mol.

Y (C3H6O2) = 1.12 l. since the amount of substances according to the equation is 1 mol.

4. Find the mass of the product:

m (C3H6O) = Y * M = 1.12 * 74 = 82.88 g.

m (practical) = 0.92 * 82.88 = 76.25 g.

Answer: propionic acid was obtained with a mass of 76.25 g.

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