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congbui101220
2 năm trước
Bài 1: Xác định A, B, C, và hoàn thành các phương trình phản ứng sau: HCl + MnO2 ---> A↑ + B + C(lỏng) A + C --(as)--> D + E D + Ca(OH)2 ----> G + C F + E --(to)--> C F + A ----> D Bài 2 : Đốt C trong không khí ở nhiệt độ cao thu được hh khí A1. Cho A1 tác dụng với CuO nung nóng thu được khí A2 và hh A3. Cho A2 tác dụng với dd Ca(OH)2 thì thu được kết tủa A4 và dd A5. Cho A5 tác dụng với Ca(OH)2 lại thu được A4. Nung A4 ta lại thu được A2. Cho biết A1,A2,A3,A4,A5 là chất gì. Viết các phương trình phản ứng đã xảy ra M.ng giúp mình với ạ !
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