Задание-1
Na2CO3=Na2O+CO2
CO2+CaO=CaCO3
CaCO3+CO2+H2O=Ca(HCO3)2
Ca(HCO3)2=CaCO3+CO2+H2O
Задание-2
CuO+H2SO4=CuSO4+H2O
CuSO4+2KOH=Cu(OH)2+K2SO4
Cu(OH)2+2HCl=CuCl2+2H2O
CuCl2+Zn=ZnCl2+Cu
Задание-3
K2Cr2O7+14HCl=
2CrCl3+3Cl2+2KCl+7H2O
CrCl3+3NaOH=Cr(OH)3+3NaCl
Cr(OH)3+3NaOH=Na3[Cr(OH)6]
2Na3[Cr(OH)6+3H2O2=
2Na2CrO4+2NaOH+8H2O
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Answers & Comments
Задание-1
Na2CO3=Na2O+CO2
CO2+CaO=CaCO3
CaCO3+CO2+H2O=Ca(HCO3)2
Ca(HCO3)2=CaCO3+CO2+H2O
Задание-2
CuO+H2SO4=CuSO4+H2O
CuSO4+2KOH=Cu(OH)2+K2SO4
Cu(OH)2+2HCl=CuCl2+2H2O
CuCl2+Zn=ZnCl2+Cu
Задание-3
K2Cr2O7+14HCl=
2CrCl3+3Cl2+2KCl+7H2O
CrCl3+3NaOH=Cr(OH)3+3NaCl
Cr(OH)3+3NaOH=Na3[Cr(OH)6]
2Na3[Cr(OH)6+3H2O2=
2Na2CrO4+2NaOH+8H2O