Question

2. Напишите уравнения реакций, с помощью которых можно осуществить следующие переходы: 1) S → SO2 → SO3 → H2SO4 → Na2SO4 → BaSO4 2) NH3 → N2 → NO → NO2 → HNO3 → NO2 3) SiO2 → Si → Mg2Si → SiH4 → SiO2 → K2SiO3

Answer 1

1. S+O2=SO2
2. 2SO2+O2=2SO3
3. SO3+H2O=H2SO4
4. 2NaOH+H2SO4=Na2SO4+2H2O
5. Na2SO4+Ba(NO3)2=2NaNO3+BaSO4

Answer 2

Уравнения реакций для переходов:

1) S → SO2 → SO3 → H2SO4 → Na2SO4 → BaSO4

- Sulfur (S) reacts with oxygen (O2) to form sulfur dioxide (SO2): S + O2 → SO2 [[6]](http://res2.baa.by/%D0%AD%D0%A3%D0%9C%D0%9A%20%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F%20%D0%97%D0%BE%D0%BE%D1%82%D0%B5%D1%85%D0%BD%D0%B8%D1%8F%20%D0%B8%20%D1%80%D1%8B%D0%B1%D0%BE%D0%B2%D0%BE%D0%B4%D1%81%D1%82%D0%B2%D0%BE/books/%D0%9E%D0%B1%D1%89%D0%B0%D1%8F%20%D1%85%D0%B8%D0%BC%D0%B8%D1%8F%20%D1%81%20%D0%BE%D1%81%D0%BD%20%D0%B0%D0%BD%D0%B0%D0%BB%D0%B8%D1%82%20%D0%97%D0%98%D0%A4%202.pdf). - Sulfur dioxide (SO2) reacts with more oxygen (O2) to form sulfur trioxide (SO3): 2(SO2) + O2 → 2(SO3) [[6]](http://res2.baa.by/%D0%AD%D0%A3%D0%9C%D0%9A%20%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F%20%D0%97%D0%BE%D0%BE%D1%82%D0%B5%D1%85%D0%BD%D0%B8%D1%8F%20%D0%B8%20%D1%80%D1%8B%D0%B1%D0%BE%D0%B2%D0%BE%D0%B4%D1%81%D1%82%D0%B2%D0%BE/books/%D0%9E%D0%B1%D1%89%D0%B0%D1%8F%20%D1%85%D0%B8%D0%BC%D0%B8%D1%8F%20%D1%81%20%D0%BE%D1%81%D0%BD%20%D0%B0%D0%BD%D0%B0%D0%BB%D0%B8%D1%82%20%D0%97%D0%98%D0%A4%202.pdf). - Sulfur trioxide (SO3) reacts with water (H2O) to form sulfuric acid (H2SO4): SO3 + H2O → H2SO4. - Sulfuric acid (H2SO4) reacts with sodium hydroxide (NaOH) to form sodium sulfate (Na2SO4): H2SO4 + 2(NaOH) → Na2SO4 + 2(H2O). - Sodium sulfate (Na2SO4) reacts with barium chloride (BaCl2) to form barium sulfate (BaSO4): Na2SO4 + BaCl2 → BaSO4 + 2(NaCl).

2) NH3 → N2 → NO → NO2 → HNO3 → NO2

- Ammonia (NH3) reacts with oxygen (O2) to form nitrogen gas (N2): 4(NH3) + 5(O2) → 4(N2) + 6(H2O). - Nitrogen gas (N2) reacts with oxygen (O2) to form nitric oxide (NO): N2 + O2 → 2(NO). - Nitric oxide (NO) reacts with more oxygen (O2) to form nitrogen dioxide (NO2): 2(NO) + O2 → 2(NO2). - Nitrogen dioxide (NO2) reacts with water (H2O) to form nitric acid (HNO3): 3(NO2) + H2O → 2(HNO3) + NO. - Nitric acid (HNO3) reacts with nitrogen dioxide (NO2) to form more nitric acid (HNO3): HNO3 + NO2 → 2(HNO3).

3) SiO2 → Si → Mg2Si → SiH4 → SiO2 → K2SiO3

- Silicon dioxide (SiO2) can be reduced with carbon (C) to form silicon (Si): SiO2 + 2(C) → Si + 2(CO). - Silicon (Si) reacts with magnesium (Mg) to form magnesium silicide (Mg2Si): Si + 2(Mg) → Mg2Si. - Magnesium silicide (Mg2Si) reacts with water (H2O) to form silane gas (SiH4): Mg2Si + 4(H2O) → 2(Mg(OH)2) + SiH4. - Silane gas (SiH4) can be oxidized with oxygen (O2) to form silicon dioxide (SiO2): SiH4 + O2 → SiO2 + 2(H2O). - Silicon dioxide (SiO2) can react with potassium hydroxide (KOH) to form potassium silicate (K2SiO3): SiO2 + 2(KOH) → K2SiO3 + H2O.

Please note that the equations provided are simplified representations of the reactions and may not include all the necessary stoichiometric coefficients.