CH4+Cl2=CH3CL+HCl
2CH3CL+2Na=C2H6+2NaCL
C2H6=C2H4+H2
C2H4+H2O=C2H5OH
C2H5OH+3O2=2CO2+3H2O
C2H5OH+HCOOH=HCOOC2H5+H2O
В растворе кислот фенолфталеин не изменяет окраску.
SiO2 → Na2SiO3 → H2SiO3 → SiO2
2NaOH + SiO2 = Na2SiO3 + H2O
1) 2HCOOH+2K=2HCOOK+H2
2) K2O+HCOOH=2HCOOK+H2O
3)KOH+HCOOH=HCOOK+H2O
4)CaCO3+2HCOOH=CO2+H2O+(HCOO)2Ca
<span>5)CH3CH2CH2OH+HCOOH=HCOOC3H7+H2O</span>