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letuan10082004
2 năm trước
Câu 9: Cho 13,05 gam MnO2 tác dụng vừa đủ với m gam dd HCl 36,5%, đun nóng. a) Tính thể tích khí thu được (ở đktc). (Giả sử hiệu suất phản ứng là 100%). b) Tính m gam và nồng độ phần trăm chất có trong dung dịch thu được. c) Để trung hoà m gam dd HCl trên cần dùng V (l) dd NaOH 8% (khối lượng riêng 1,07 gam/ml). Tính V.
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