(1,5 điểm) Cho sơ đồ chuyển hóa sau:
a) Hoàn thành sơ đồ trên.
b) Phức chất nào trong sơ đồ trên có dạng bát diện?
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Hiện tượng:
Sodium (Na) nóng chảy thành giọt, chạy tròn trên mặt dung dịch.
Có khí thoát ra (H₂).
Xuất hiện kết tủa màu xanh lam (Cu(OH)2).
Phương trình hóa học:
1. Phản ứng của Na với H2O: 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
2. Phản ứng của NaOH với CuSO4: 2NaOH(aq) + CuSO4(aq) → Cu(OH)2(s) + Na2SO4(aq)