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nahco3 ba oh 2 dư
nahco3 ca oh 2 dư
nahco3 + ba oh 2 dư
cho dung dịch nahco3 dư vào dung dịch ba oh 2
ba oh 2 + nahco3
nahco3 ba hco3 2
ba hco3 2 + nahco3
ba no3 2 + nahco3
ba hco3 2 + nahso4
naoh + ba hco3 2
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