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nguyenvannhuthuan66
2 năm trước
Dung dịch bão hoà H2S có nồng độ 0,10 M. Hằng số axit của H2S: `K1 = 1,0 × 10^7` và `K2 = 1,3 × 10^13` a) Tính nồng độ ion sunfua trong dung dịch H2S 0,10 M khi điều chỉnh pH = 3,0. b) Một dung dịch A chứa các cation Mn2+ và Ag+ với nồng độ ban đầu của mỗi ion đều bằng 0,010 M. Hoà tan H2S vào A đến bão hoà và điều chỉnh pH = 3,0 thì ion nào tạo kết tủa. Cho: `T_{MnS} = 2,5 × 10^10` ; ` T_(Ag_2S) = 6,3 ×10^50`
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