A-5, Б-4, В-1
2AgNO3+Cu=Cu(NO3)2+2Ag
2Na+MgSO4+Na2SO4+Mg
H2CO3+BaCl2=BaCO3+2HCl
AgNO3+KCl=AgCl+KNO3
FeSO4+2NaOH=Fe(OH)2+Na2SO4
2NaOH+SO2=Na2SO3+H2O
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A-5, Б-4, В-1
2AgNO3+Cu=Cu(NO3)2+2Ag
2Na+MgSO4+Na2SO4+Mg
H2CO3+BaCl2=BaCO3+2HCl
AgNO3+KCl=AgCl+KNO3
FeSO4+2NaOH=Fe(OH)2+Na2SO4
2NaOH+SO2=Na2SO3+H2O