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Объяснение:
Объяснение:
1.
1) Si + O₂ (t° = 400-500°C) → SiO₂
2) SiO₂ + 2NaOH → Na₂SiO₃ + H₂O
3) Na₂SiO₃ + 2HCl → H₂SiO₃↓ + 2NaCl
4) H₂SiO₃ (t°) → SiO₂ + H₂O
5) SiO₂ + 2LiOH → Li₂SiO₃ + H₂O
2.
1) 2Na + 2H₂O → 2NaOH + H₂↑
2) 2NaOH + CO₂ → Na₂CO₃ + H₂O
3) Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂↑
4) CO₂ + CaO → CaCO₃
5) CaCO₃ (t°) → CaO + CO₂↑
Где необходимо составьте сокращенные ионные уравнения:
1.
2) SiO₂ + 2OH⁻ → SiO₃²⁻ + H₂O
3) SiO₂ + 2H⁺ → SiO₃²⁻ + H₂O
5) SiO₂ + 2OH⁻ → SiO₃²⁻ + H₂O
2.
2) 2OH⁻ + CO₂ → CO₃²⁻ + H₂O
3) CO₃²⁻ + 2H⁺ → H₂O + CO₂↑