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tiaquocthang.thcspl2
2 năm trước
4. Có a gam hỗn hợp X gồm K2CO3, Na2CO3., NaOH cho phản ứng vừa đủ với 450 ml dung dịch HCI 2M thì thu được 7,84 lít khí (dktc). Cũng a gam X trên hòa tan vào nước thì thu được dung dịch Y. Dẫn khí CO2 vào dung dịch Y thì sau khi phản ứng kết thúc trong dung dịch thấy có (a + 15) gam muối tan. Tính khối lượng CO2 đã hấp thụ vào dung dịch Y? .. ....................... .
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