<span>1)Al2(SO4)3+3BaCl2=3BaSO4+2AlCl3
2Al</span>³⁺+3SO4²⁻3Ba²⁺6Cl⁻=3BaSO4+2Al³⁺6Cl⁻
3Ba²⁺+3SO4²⁻=3BaSO4
<span>2)Mg(OH)2+2HNO3=Mg(NO3)2+2H2O
</span>Mg(OH)2+2H⁺+2NO3⁻=Mg²⁺+2NO3⁻+2H2O
Mg(OH)2+2H⁺=Mg²⁺+2H2O
<span>3)K2SO3+2HCL=2KCL+SO2+H2O
2K</span>⁺SO3²⁻+2H⁺+2Cl⁻=2K⁺+2Cl⁻+SO2+H2O
2H⁺+SO3²⁻=SO2+H2O
N(CO₂)=112:22,3=5 моль
m(CO₂)=5*44=220г
H2SO4+2NaOH=Na2SO4+2H2O
m(NaOH)р-ра=250*1,2=300г;