The thermodynamic ionization constant K° of p-nitrophenol in {10 mass% ethanol-water} mixed solvent is derived from measurements of its absorption spectrum and pH by the two methods: Debye--Huckel extrapolation a...The thermodynamic ionization constant K° of p-nitrophenol in {10 mass% ethanol-water} mixed solvent is derived from measurements of its absorption spectrum and pH by the two methods: Debye--Huckel extrapolation and polynomial approximation proposed by us in suitable buffer solution at constant ionic strength from 0.1 to 2.0 mol.kg^(-1) at 298.2 ± 0.2 K. The results from both methods are pK° =7.406 and 7.415, respectively. The effect of medium on the ultraviolet spectra of p-nitrophenol has been discussed.展开更多
基金Project supported by The National Natural Science Foundation of China.
文摘The thermodynamic ionization constant K° of p-nitrophenol in {10 mass% ethanol-water} mixed solvent is derived from measurements of its absorption spectrum and pH by the two methods: Debye--Huckel extrapolation and polynomial approximation proposed by us in suitable buffer solution at constant ionic strength from 0.1 to 2.0 mol.kg^(-1) at 298.2 ± 0.2 K. The results from both methods are pK° =7.406 and 7.415, respectively. The effect of medium on the ultraviolet spectra of p-nitrophenol has been discussed.
