Помогите решить №556 Срочно!!!!. Created by Nastya26031999. himiya-ru

Помогите решить №556 Срочно!!!!...

Nastya26031999 @Nastya26031999

August 2021 1 9 Report

Помогите решить №556 Срочно!!!!

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Prikolist5221 А) Na → NaOH → Na2CO3 → CO2 → CaCO3 → CO2 → H2CO3

2Na + 2H2O = 2NaOH + H2↑

NaHCO3 + NaOH = Na2CO3 + H2O
Na⁺ + HCO3⁻ + Na⁺ + OH⁻ = 2Na⁺ + CO3⁻ + H2O
HCO3⁻ + OH⁻ = CO3⁻ + H2O

Na2CO3 = Na2O + CO2
CaO + CO2 = CaCO3
CaCO3 = CaO + CO2
CO2 + H2O = H2CO3

б) Cl2 → HCl → ZnCl2 → Zn(OH)2 → ZnO → Zn(NO3)2 → ZnS

Cl2 + H2 = 2HCl
Zn + 2HCl = ZnCl2 + H2↑

2NaOH + ZnCl2 = Zn(OH)2↓ + 2NaCl
2Na⁺ + 2OH⁻ + Zn²⁺ + 2Cl⁻ = Zn(OH)2↓ + 2Na⁺ + 2Cl⁻
2OH⁻ + Zn²⁺ = Zn(OH)2↓

Zn(OH)2 = ZnO + H2O

ZnO + 2HNO3 = Zn(NO3)2 + H2O
ZnO + 2H⁺ + 2NO3⁻ = Zn²⁺ + 2NO3⁻ + H2O
ZnO + 2H⁺ = Zn²⁺ + H2O

Zn(NO3)2 + K2S = ZnS↓ + 2KNO3
Zn²⁺ + 2NO3⁻ + 2K⁺ + S²⁻ = ZnS↓ + 2K⁺ + 2NO3⁻
Zn²⁺ + S²⁻ = ZnS↓

в) CuO → Cu → CuCl2 → Cu → Cu(NO3)2 → Cu(OH)2

CuO + H2 = Cu + H2O
Cu + Cl2 = CuCl2
3CuCl2 + 2Al = 2AlCl3 + 3Cu↓
Cu + 2AgNO3 = Cu(NO3)2 + 2Ag↓

Cu(NO3)2 + 2NaOH = Cu(OH)2↓ + 2NaNO3
Cu²⁺ + 2NO3⁻ + 2Na⁺ + 2OH⁻ = Cu(OH)2↓ + 2Na⁺ + 2NO3⁻
Cu²⁺ + 2OH⁻ = Cu(OH)2↓

г) P2O5 → Na3PO4 → Na2SO4 → NaOH → Na2S

P2O5 + 3Na2O = 2Na3PO4

Na3PO4 + H2SO4 = NaH2PO4 + Na2SO4
3Na⁺ + PO4³⁻ + 2H⁺ + SO4²⁻ = Na⁺ + H2PO4⁻ + 2Na⁺ + SO4²⁻
PO43³⁻ + 2H⁺ = H2PO4⁻

Na2SO4 + Ba(OH)2 = BaSO4↓ + 2NaOH
2Na⁺ + SO4²⁻ + Ba²⁺ + 2OH⁻ = BaSO4↓ + 2Na⁺ + 2OH⁻
SO4²⁻ + Ba²⁺ = BaSO4↓

H2S + 2NaOH = Na2S + 2H2O
H2S + 2Na⁺ + 2OH⁻ = 2Na⁺ + S²⁻ + 2H2O
H2S + 2OH⁻ = S²⁻ + 2H2O

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