sao day

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phong12a1

thuc hien phan ung este hoa 6g axit cacboxylic voi ancol etylic thi thu dc 5,28g este. tim ctpt cua axit va este biet hieu suat phan ung dat 60%

Bài
làm:
axit : RC00H +H0-C2H5-----H2S04-->R-C00-C2H5 +H20
Lí thuyết a a mol
Thực tế a 0.6a mol
Ta có :1.R+45=6/a
2.R+73=5.28/0.6a
-->a=0.1 mol
-->R=15
R:CH3
Axit :CH3C00H
este :CH3-C00-C2H5
 
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