Level 9 Level 11

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SiO₂ + H₂ →
Si + H₂O
Si + Mg →
Mg₂Si
Mg₂Si + H₂O →
Mg(OH)₂ + SiH₄
SiH₄ + H₂O →
SiO₂ + H₂
SiO₂ + KOH →
K₂SiO₃ + H₂O