The oxidation of 8.8 g of acetaldehyde with an ammonia solution of silver oxide gave 10 g of acetic acid. calculate the mass fraction

| January 7, 2021 | education

The oxidation of 8.8 g of acetaldehyde with an ammonia solution of silver oxide gave 10 g of acetic acid. calculate the mass fraction (in%) of the acid yield from the theoretically possible.

1. Let’s compose the reaction equation:
CH3COH + Ag2O → CH3COOH + 2Ag;
2. Let’s calculate the chemical amount of acetaldehyde:
n (CH3COH) = m (CH3COH): M (CH3COH);
M (CH3COH) = 12 + 3 + 12 + 16 + 1 = 44 g / mol;
n (CH3COH) = 8.8: 44 = 0.2 mol;
3. Determine the theoretical amount of acetic acid:
ntheor (CH3COOH) = n (CH3COH) = 0.2 mol;
4. Find the theoretical mass of the acid:
mtheor (CH3COOH) = ntheor (CH3COOH) * M (CH3COOH);
M (CH3COOH) = 12 + 3 + 12 + 33 = 60 g / mol;
mtheor (CH3COOH) = 0.2 * 60 = 12 g;
5. Let’s calculate the mass fraction of the acid yield:
ν = mpr (CH3COOH): mtheor (CH3COOH) = 10: 12 = 0.8333 or 83.33%.
Answer: 83.33%.



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