Write the reaction equations: Si → SiO2 → Na2SiO3 → H2SiO3 → SiO2 → Si ↓ CaSiO3

Si + O2 = SiO2
SiO2 + CaO = CaSiO3
SiO2 + 2NaOH = Na2SiO3 + H2O
Na2SiO3 + 2HCl = 2NaCl + H2SiO3
H2SiO3 = SiO2 + H2O
SiO2 + 2С = Si + 2CO



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