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Lalavu97
2 năm trước
Giúp mình vs mn😭😭 Câu 1: (2,5 điểm) Hoàn thành dãy chuyển hóa sau, ghi rõ điều kiện(nếu có) (4) Na (1) Na2O (2) NaOH (3) Na2CO3 (5) NaCl Câu 2: (3,5 điểm) Trung hòa 50ml dung dịch H2SO4 1M bằng dung dịch NaOH 16%. a. Viết PTHH. b. Tính khối lương dung dịch NaOH cần dùng. c. Nếu trung hòa lượng axit trên bằng dung dịch KOH 5,6% có khối lượng riêng là 1,045g/ml, thì cần bao nhiêu ml dung dịch KOH? Câu 3: (1 điểm) Cho 7,2 g oxit kim loại hóa trị II vào 50g dung dịch HCl 14,6% . Xác định oxit kim loại trên.
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