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ducvinhltv
2 năm trước
B1:Sục từ từ khí cacbonic vào dung dịch Ca(OH)2 thu được kết tủa và dung dịch A. Lọc kết tủa, đun nhẹ dung dịch lại thấy xuất hiện kết tủa. Dung dịch A chứa chất tan là ca(hco3)2 và ca(oh)2 ca(oh)2 ca(hco3)2 caco3 B2:Trộn 2 dung dịch Ba(HCO3)2 , NaOH có cùng nồng độ mol/l với nhau theo tỉ lệ thể tích 1:1 thu được kết tủa X và dung dịch Y. Dung dịch Y chứa chất tan là? ( chỉ viết kết quả )
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