1) 2Al + 6NaOH + → 3H2↑ + 2Na₃AlO₃
2) 3Na₃AlO₃ + 6H₂SO₄ → Al₂(SO₄)₃ + 3Na₂SO₄ + 6H₂O
3) Al₂(SO₄)₃ + 3Ca → 3CaSO₄ + 2Al
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1) 2Al + 6NaOH + → 3H2↑ + 2Na₃AlO₃
2) 3Na₃AlO₃ + 6H₂SO₄ → Al₂(SO₄)₃ + 3Na₂SO₄ + 6H₂O
3) Al₂(SO₄)₃ + 3Ca → 3CaSO₄ + 2Al