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thaomy20081029
2 năm trước
Câu 1: Biết rằng : a, Một chất bazơ phản ứng với nước chất axit tạo thành muối và nước b, Một chất oxit bazơ phản ứng với một chất axit tạo thành muối và nước c, Một chất oxit axit tác dụng với dung dịch bazơ tạo thành muối vào nước Mỗi loại phản ứng viết 4 Phương trình hóa học minh họa Câu 2: Hòa tan hết hỗn hợp gồm 5,6 gam sắt và 2,4 gam Magie trong dung dịch HCl 7,3% a, Tính VH2 b,Tính mdd HCl phải dùng Câu 3: Hòa tan 5,4 gam nhôm trong 200ml dung dịch HCl 1M.Tính VH2 thoát ra (ở đktc) Câu 4: Hòa tan 8 gam SO3 vào 300 gam dung dịch H2 SO4 20%. Tính C % của dung dịch thu được Giúp mình hết nha
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