Question

Na + ... → Na2O Na2O + ... →NaOH NaOH + ... → Na2SO4 Na2SO4 + ... → BaSO4 Na + … → NaOH Na2O + … → Na2SO4 NaOH + … → Na2ZnO2 C + … → CO2 CO2 + … → CaCO3 CaCO3 + … → CO2 CO2 + … → BaCO3 CO2 + … → Na2CO3 Na2CO3 + … → CO2

Answer 1

Ответ:

4Na + O2 → 2Na2O

Na2O + H2O → 2NaOH

2NaOH + H2SO4 → Na2SO4 + 2H2O

Na2SO4 + BaCl2 → BaSO4 ↓ + 2NaCl

2Na + 2H2O → 2NaOH + H2↑

Na2O + SO3 → Na2SO4

2NaOH + ZnO → Na2ZnO2  + H2O

C + O2 → CO2  (при избытке кислорода)

CO2 + CaO → CaCO3↓

CaCO3 + 2HCl → CO2↑ + H2O + CaCl2

CO2 + BaO → BaCO3↓

CO2 + Na2O → Na2CO3

Na2CO3 + 2HNO3 → CO2↑ + H2O + 2NaNO3

Answer 2

Here are the missing reactants for each chemical equation you provided:

1. Na + O2 → 2 Na2O (sodium reacts with oxygen gas to form sodium oxide)
2. Na2O + H2O → 2 NaOH (sodium oxide reacts with water to form sodium hydroxide)
3. NaOH + H2SO4 → Na2SO4 + H2O (sodium hydroxide reacts with sulfuric acid to form sodium sulfate and water)
4. Na2SO4 + BaCl2 → BaSO4 + 2 NaCl (sodium sulfate reacts with barium chloride to form barium sulfate and sodium chloride)
5. Na + H2O → NaOH + 0.5 H2 (sodium reacts with water to form sodium hydroxide and hydrogen gas)
6. Na2O + H2SO4 → Na2SO4 + H2O (sodium oxide reacts with sulfuric acid to form sodium sulfate and water)
7. NaOH + Na2ZnO2 → Na2ZnO3 + H2O (sodium hydroxide reacts with sodium zincate to form sodium zincate hydroxide and water)
8. C + O2 → CO2 (carbon reacts with oxygen gas to form carbon dioxide)
9. CO2 + Ca(OH)2 → CaCO3 + H2O (carbon dioxide reacts with calcium hydroxide to form calcium carbonate and water)
10. CaCO3 + 2 HCl → CO2 + CaCl2 + H2O (calcium carbonate reacts with hydrochloric acid to form carbon dioxide, calcium chloride, and water)
11. CO2 + Ba(OH)2 → BaCO3 + H2O (carbon dioxide reacts with barium hydroxide to form barium carbonate and water)
12. CO2 + Na2CO3 → NaHCO3 (carbon dioxide reacts with sodium carbonate to form sodium bicarbonate)
13. NaHCO3 + HCl → NaCl + CO2 + H2O (sodium bicarbonate reacts with hydrochloric acid to form sodium chloride, carbon dioxide, and water)