с задачей ,с объяснением
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В скобках после стрелочки - условия реакции.(Hg²+ ->2+  это заряд)

1)CH3-CH3 ->(t°,Ni) CH≡CH + 2H2

2)CH≡CH + 2H2 ->(t°,Ni) CH3-CH3

3)CH≡CH+H2O -> (Hg²+;t°) ->CH3-CHO

4)CH3-CHO + 2Cu(OH)2 ->(t°) CH3-COOH + Cu2O + 2H2O

5) CH3-COOH + CH3OH ⇄ (H+;t°) CH3-COO-CH3 + H2O

6)CH3-COO-CH3 + H2O ⇄(H+;t°) CH3OH + CH3-COOH

7)CH3-COO-CH3 + H2O ⇄(H+;t°) CH3OH + CH3-COOH

8)CH3-COOH + CH3OH ⇄ (H+;t°) CH3-COO-CH3 + H2O

9) CH3-CHO + H2 -> (t°;Ni) CH3-CH2OH

10)CH3-CH2OH + CuO -> (t°) CH3-CHO + Cu + H20

11)CH3-CH2OH + HCL -> CH3-CH2Cl + H2O

В скобках после стрелочки - условия реакции.

1)CH3Cl + NaOH(водный) -> CH3OH + HCl

2)CH2=CH2+HCl->CH3-CH2Cl

3)CH3-CH2Cl +KOH(спиртовой раствор)->(t°) CH2=CH2 + KCl + H20

4) CH3-CH3 ->(t°;Ni) CH2=CH2 + H2

5)CH2=CH2+H2 ->(t°;Pt) CH3-CH3

6)CH3-CH3 + O2 ->(t°,kat,p) CH3-CHO +H2O

7)CH3-COOH+NaOH -> CH3-COONa + H2O

  CH3-COONa+NaOH ->(t°) CH4+ Na2CO3

8)2CH3-CH3 + 3O2 ->(t°,kat,p) 2CH3-COOH + 2H2O

9)CH2=CH2+H20 ->(H+;t°) CH3-CH2OH

10)CH3-CH2OH ->(t°>140°;H+)CH2=CH2 + H2O

11) 2CH3Cl + 2Na ->(t°) CH3-CH3 + 2NaCl