The reaction of the “silver mirror” released 10.8 g of silver. calculate the mass of acetaldehyde that has entered into the oxidation reaction.
1. Let’s compose the reaction equation:
CH3CHO + Ag2O → CH3COOH + 2Ag;
2. Let’s calculate the chemical amount of silver:
n (Ag) = m (Ag): M (Ag) = 10.8: 108 = 0.1 mol;
3. Determine the amount of acetaldehyde:
n (CH3CHO) = n (Ag): 2 = 0.1: 2 = 0.05 mol;
4. Let’s calculate the mass of acetaldehyde:
m (CH3CHO) = n (CH3CHO) * M (CH3CHO);
M (CH3CHO) = 12 + 3 + 12 + 1 + 16 = 44 g / mol;
m (CH3CHO) = 0.05 * 44 = 2.2 g.
Answer: 2.2 g.
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