Question

Осуществить превращения.1. Zn → ZnO → ZnCl2 →Zn(OH)2 → ZnO → Zn2. Ca → Ca(OH)2 → CaSO4 → BaSO43. S → SO2 → SO3 → H2SO4 → Na2SO44. C → CO2 → CaCO3 → CO2 → CaCO3 → Ca(NO3)2

Answer 1

Решение ( 20 символов )

Answer 2

1. Zn → ZnO → ZnCl2 → Zn(OH)2 → ZnO → Zn

The transformation of zinc (Zn) can occur through several steps. Initially, zinc reacts with oxygen (O) to form zinc oxide (ZnO) [[1]]. This reaction can be represented as:

Zn + O2 → ZnO

Zinc oxide can further react with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) [[2]]:

ZnO + 2HCl → ZnCl2 + H2O

Zinc chloride can then react with sodium hydroxide (NaOH) to form zinc hydroxide (Zn(OH)2) [[3]]:

ZnCl2 + 2NaOH → Zn(OH)2 + 2NaCl

Zinc hydroxide can be dehydrated to form zinc oxide again:

Zn(OH)2 → ZnO + H2O

Finally, zinc oxide can be reduced back to elemental zinc:

ZnO → Zn

2. Ca → Ca(OH)2 → CaSO4 → BaSO4

The transformation of calcium (Ca) can occur through a series of reactions. Calcium can react with water (H2O) to form calcium hydroxide (Ca(OH)2) [[4]]:

Ca + 2H2O → Ca(OH)2

Calcium hydroxide can then react with sulfuric acid (H2SO4) to form calcium sulfate (CaSO4) [[5]]:

Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

Calcium sulfate can further react with barium chloride (BaCl2) to form barium sulfate (BaSO4):

CaSO4 + BaCl2 → BaSO4 + CaCl2

3. S → SO2 → SO3 → H2SO4 → Na2SO4

The transformation of sulfur (S) can occur through a series of reactions. Sulfur can react with oxygen (O2) to form sulfur dioxide (SO2) [[6]]:

S + O2 → SO2

Sulfur dioxide can then react with oxygen again to form sulfur trioxide (SO3) [[7]]:

2SO2 + O2 → 2SO3

Sulfur trioxide can react with water (H2O) to form sulfuric acid (H2SO4) [[8]]:

SO3 + H2O → H2SO4

Sulfuric acid can react with sodium hydroxide (NaOH) to form sodium sulfate (Na2SO4) [[9]]:

H2SO4 + 2NaOH → Na2SO4 + 2H2O

4. C → CO2 → CaCO3 → CO2 → CaCO3 → Ca(NO3)2

The transformation of carbon (C) can also occur through a series of reactions. Carbon can react with oxygen (O2) to form carbon dioxide (CO2) [[10]]:

C + O2 → CO2

Carbon dioxide can then react with calcium hydroxide (Ca(OH)2) to form calcium carbonate (CaCO3) [[11]]:

CO2 + Ca(OH)2 → CaCO3 + H2O

Calcium carbonate can be heated to release carbon dioxide again:

CaCO3 → CO2 + CaO

Calcium oxide (CaO) can react with nitric acid (HNO3) to form calcium nitrate (Ca(NO3)2) [[12]]:

CaO + 2HNO3 → Ca(NO3)2 + H2O

Please note that the reactions provided are simplified representations and may not account for all possible reaction conditions or side reactions.