3. AI⇒AICI₃⇒AI(NO₃)₃⇒AI(OH)₃⇒AI₂O₃⇒NaAIO₂
2AI + 6HCI=2AICI₃+3H₂↑↑
AICI₃ + 3HNO₃= AI(NO₃)₃ + 3HCI
AI(NO₃)₃ + 3NaOH= AI(OH)₃↓↓ + 3NaNO₃
2AI(OH)₃+ t = AI₂O₃ + 3H₂O
AI₂O₃ + Na₂O(сплавление) = 2NaAIO₂
4.
AI⇒K[AI(OH)₄]⇒AI(OH)₃⇒AICI₃
2AI + 2KOH + 6H₂O= 2K[AI(OH)₄] +3H₂
K[AI(OH)₄] + t= AI(OH)₃↓ + KOH
AI(OH)₃ + 3HCI = AICI₃+ 3H₂O