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phuongthoxom2
2 năm trước
1) a) Nêu phương pháp nhận biết các chất lỏng sau: H 2 O , K 2 S O 4 , H 2 S O 4 , K O H b) Nếu phương pháp nhận biết các chất khí sau: H 2 , O 2 , C O 2 , không khí 2) Bổ túc và hoàn thành các PTPU: a) ... + ... → H 3 P O 4 b) ... + ... → C a ( O H ) 2 c) H 2 O + ... → K O H + . . . d) H 2 + . . . → H g + . . . e) ... + ... → C O 2 + H 2 O f) ... + ... → H 2 S O 4
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