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talaaidoaibiet
2 năm trước
Câu 4: Có những chất sau: H2O, KOH, K2O, CO2. Hãy cho biết những cặp chất nào có thể tác dụng với nhau. Viết phương trình phản ứng. Câu5: Viết phương trình phản ứng cho mỗi chuyển đổi sau a) CaCO3 CaO Ca( OH)2 CaCl2 CaCO3 b) S SO2 SO3 H2SO4 Na2SO3 Câu 6: Trình bày phương pháp hóa học để phân biệt các chất rắn sau: CaO, P2O5 , SiO2
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