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Na -> NaOH -> Na2SO3
|
S -> SO2 -> H2SO3
C -> CO2 -> H2CO3 -> CO2 -> CaCO3
K-> KOH -> K3PO4
|
K2O
Na -> NaOH -> Na2SO3
|
S -> SO2 -> H2SO3
C -> CO2 -> H2CO3 -> CO2 -> CaCO3
K-> KOH -> K3PO4
|
K2O
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Ответ:
Na->NaOH->Na2SO3
|
S->SO2->H2SO3
2 Na+2 H2O = 2 NaOH+H2
NaOH+K2SO3 = Na2SO3+2 KOH
S+O2 = SO2
SO2+H2O = H2SO3
H2SO3+2 NaOH = Na2SO3+2 H2O
C->CO2->H2CO3->CO2->CaCO3
C+O2 = CO2
CO2+H2O = H2CO3
H2CO3 = CO2+H2O
CaO+CO2 = CaCO3
K->KOH->K3PO4
|
K2O
2 K+2 H2O = 2 KOH+H2
3 KOH+H3PO4 = K3PO4+3 H2O
2 KOH = K2O+H2O