С : Н : О : N = 20 : 6,67 : 26,67 : 46,66
C2H5OH=C2H4+H2O <span> </span>
C2H4+HCl=C2H5Cl <span>В. этен, хлорэтан</span>
C2H6 = C2H4 + H2
C2H4 + H2O = C2H5OH
C2H5OH + CuO = CH3CHO + Cu + H2O
<u>1.CO</u><span><u>2-CaCO3-Ca(HCO3)2-CaCO3-Ca(NO3)2</u>
1) </span><span>CO2+CaO=CaCO3
2) </span><span>CaCO3+ H2O+CO2=Ca(HCO3)2
3) </span><span>Ca(HCO3)2+ Ca(OH)2=2CaCO3 + 2H2O
4) </span><span>CaCO3 + 2HNO3=Ca(NO3)2 + H2O + CO2
5)</span><span> CaCO3 = (разложение при температуре) CaO + CO2
</span>6) CaO + H2O = Ca(OH)2<span>
<u>2. CuO</u></span><span><u>-CuCl2-Cu(OH)3-Fe3(SO4)3-FeCl3
</u>1) </span>CuO + 2HCl=CuCl2<span> + H</span>2O<span>
<u />2) </span>CuCl2<span> + 2NaOH=Cu(OH)</span>2↓ + 2NaCl<span>
3) ?????
4) </span><span>Fe2(SO4)3+6NaCl=2FeCl3+3Na2SO4
</span><u>CuCl2 + 2NaOH=Cu(OH)2↓ + 2NaCl
</u>Cu(2+)+2Cl(-)+2Na(+)+2OH(-)=Cu(OH)2↓+2Na(+)+2Cl(-)
Cu(2+)+2OH(-)=Cu(OH)2↓<u>
</u>