Question

можно решение хотя бы одного из 3 и 4

Answer 1

#3

ch2=ch2+h2o->{h+} ch3-ch2-oh

ch3-ch2-oh+cuo->{t°} cu+h2o+ch3-coh (альдегид)

ch3-coh+ag2o->{t°, p-p nh3} ch3-cooh+2ag

ch3-cooh+ch3-oh->{h2so4, t°} ch3-cooch3+h2o

#4

ch3-cooh+ch3-oh->{h2so4, t°} ch3-cooch3+h2o

n(ch3-cooch3)=m(ch3-cooch3)/M(ch3-cooch3)=14.8г/74г/моль=0.2 моль

из ур-ния реакции:

n(ch3cooh)=n(ch3-cooch3)=0.2 моль

m(ch3cooh)=n(ch3cooh)*M(ch3cooh)=0.2моль*60г/моль=12г