Write down the reaction equations according to the scheme and calculate the yield of aminoacetic acid if chloroacetic

| November 28, 2020 | education

Write down the reaction equations according to the scheme and calculate the yield of aminoacetic acid if chloroacetic acid with a mass of 126.5 g enters the reaction and glycine with a mass of 90.0 g is formed.

1. Let’s write down the reaction of obtaining aminoacetic acid from chloroacetic acid:
CH2Cl-COOH (chloroacetic acid) + 2NH3 = NH2-CH2COOH (aminoacetic acid, glycine) + NH4Cl
2. Find the amount of the substance chlorine acetic acid. To do this, use the formula n = m / M (1), where n is the amount of substance, m is the mass of the substance, M is the molar mass of the substance.
n (CH2CL-COOH) = 126.5 / 94.5 = 1.3386 mol
3.t.c. in the reaction equation, the coefficients before chloroacetic acid and glycine are the same, then the amounts of substances should be the same
Those. theoretical amount of substance (n theory) glycine = 1.3386 mol.
4. Let’s find the practical amount of substance (n pr) glycine according to the formula (1)
n pr (glycine) = 90/75 = 1.2 mol
5.The yield of aminoacetic acid is found by the formula η = n pr / n theory, where η is the yield of the reaction product
η (glycine) = 1, 2 / 1.3386 = 89.646%
Answer: the glycine yield is 89.646%



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