Let’s implement the solution:
Based on the data, we write down the equation of the process:
C3H5 (OH) 3 + 3C2H5OH = C3H5 (O) 3 – (C2H5) 3 + 3H2O – glycerin exhibits acidic properties and reacts with ethanol, the ethyl ester of glycerin is formed;
Calculations by formulas:
M (glycerol) = 92 g / mol;
M (ether) = 176 g / mol.
Let’s determine the amount of the product, if the mass is known:
Y (ether) = m / M = 20/176 = 0.1 mol;
Y (glycerol) = 0.1 mol since the amount of substances is 1 mol.
We find the mass of the original substance:
m (glycerin) = Y * M = 0.1 * 92 = 9.2 g
Answer: the mass of glycerin is 9.2 g
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