<span><span>H2SO3</span> → <span>SO2</span>+<span>H2O
</span></span><span><span>2<span>SO2</span></span>+<span>O2</span> → <span>2<span>SO3
</span></span></span><span><span>SO3</span>+<span>H2O</span> → <span>H2SO4
</span></span><span><span>H2SO4</span>+<span>Na2O</span> →<span>H2O</span>+<span>Na2SO4 </span></span>
<span><span>Na2SO4</span>+<span>2<span>HCl</span></span> → <span>2<span>NaCl</span></span>+<span>H2SO<span>4
</span></span></span>
1. Ca(HCO3)2=H2CO3+CaCO3
2. SiO2+H2O=H2SiO2
3. K2SiO2+2HCl=2KCl+H2SiO2
4. CaCO3+SiO2=CaSiO3+CO2
5. C+O2=CO2
6. CaCO3+H2SiO2=CaSiO2+H2CO3-реакция не растворима
С+2Н2=СH4
<span>CH4+Сl2(на свету) =CH3Cl;
CH3Cl+KOH(в H2O)=CH3OH
</span>CH3OH +CO=CH3COOH
C<span>H3COOH+Cl2=CH2ClCOOH+HCl</span>
1)<span> H2SiO3+KOH=KHSiO3 + H2O
2)CrO3+H2SO4=Cr2(SO4)3+H2O</span>