S+O2=SO2
<span>5SO2 + 2KMnO4 + 2H2O = 2H2SO4 + K2SO4 + 2MnSO4
</span>2Al(OH)3+3H2SO4=Al2(SO4)3+6H2O
Al2(SO4)3+6KOH=2Al(OH)3+3K2SO4
Al(OH)3+NaOH=<span>Na[Al(OH)4]</span>
CH3-CH2-OH->CH2=CH2+H2O
CH2=CH2+H2->CH3-CH3
CH3-CH3+CI2->CH3-CH2-CI+HCI
CH3-CH2-CI+H2O->C2H5OH+HCI
C2H5OH+O2=CH3-C=O-H
Алюминий, соляная кислота)
2HgO = 2Hg + O<span>2
</span>O2<span> + 2Zn = 2ZnO
</span>H2S + ZnO = ZnS + H2<span>O
</span>2H2O + Ba = Ba(OH)2<span> + H</span><span>2</span><span>↑</span>