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thuhang07012k6
2 năm trước
Câu 2: Phương trình điện li nào sau đây viết đúng ? A. H2SO4 ⇌ H+ + HSO4- B. H2CO3 ⇌ 2H+ + HCO3- C. H2SO3 → 2H+ + SO32- D. Na2S ⇌ 2Na+ + S2-
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