Write down the reaction equations: SiH4 → SiO2 → Na2SiO3 → H2SiO3 → SiO2 → Si2.

univerkov | September 7, 2021 | education

1. Monosilane is an explosive gas that forms silicon oxide with oxygen.

SiH4 + 2O2 = SiO2 + 2H2O.

2. Silicium oxide occurs naturally in the form of quartz – a very strong mineral. Forms silicate with alkali.

2NaOH + SiO2 = Na2SiO3 + H2O.

3. Reaction of sodium silicate with hydrochloric acid.
Na2SiO3 + 2HCl = 2NaCl + H2SiO3.

4. Decomposition of silicic acid.
H2SiO3 = SiO2 + H2O.

5. Reaction of recovery.
SiO2 + 2C = Si + 2CO.

OVR:
Si (+4) + 4e = Si (0). 1 reduction, oxidizing agent.
C (0) – 2e = C (+2). 2 oxidation, reducing agent.
Si (+4) + 4e = Si (0).
2C (0) – 4e = 2C (+2).

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