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NaH2PO4?2H2OMr=178.05,NaHPO4?12H2OMr=358.22,NaH2PO4?2H2OMr=156.03,0.2mol/L 溶液为 35.61g/L;0.2mol/L 溶液为 71.64g/L;0.2mol/L 溶液为 31.21g/L;附磷酸氢二钠-磷酸二氢钠缓冲液(0.2mol/L )pH值0.2mol/LNa2HPO4 溶液 (mL)0.2mol/LNaH2PO 4 溶液 (mL)5.88.0 ;92.05.910.090.06.012.387.76.115.085.06.218.581.56.322.5 ;77.56.426.573.56.531.568.56.637.5 ;62.56.743.556.56.849.0 ;51.06.9 ;55.045.07.061.039.07.167.033.07.272.028.07.377.023.07.481.0 ;19.07.584.016.07.687.0 ;13.07.789.5 ;10.57.891.5 ;8.57.993.57.58.0 ;94.75.3NaH2PO4?H2OMr=138.01, 0.2mol/L 溶液为 27.6g/L。