Ответы на вопрос:
koh,cl2; na; naoh:
1. c2h5oh+koh = c2h5ok+h2o
2. c2h5oh+cl2 = c2h5ocl+hcl
3. 2c2h5oh+2na = 2c2h5ona+h2
4. c2h5oh+naoh = c2h5ona+h2o
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