常见弱电解质电离平衡常数表

弱电解质的解离常数(近似浓度O.O1O.OO3molL-1,温度298K)名称化学式解离常数，KpK醋酸HAc1.761O-54.75碳酸 H2CO3 K1=4.3OlO76.37K2=5.611O111O.25草酸 H2C2O4 K1=5.9OlO-21.23K2=6.4OlO-54.19亚硝酸HNO2 4.61O4 (285.5K)3.37磷酸 H3PO4 K1=7.52lO-32.12K2=6.231O87.21K3=2.2lO13 (291K) 12.67亚硫酸 H2SO3 K1=1.54lO-2 (291K)1.81K2=1.O2lO-76.91硫酸H2SO4K2=l.2OlO21.92硫化氢 H2S K1=9.llO8 (291K) 7.O4K2=l.l1O-1211.96氢氰酸HCN4.931O1O9.31铬酸 H2CrO4 K1=1.8lO-1O.74K2=3.2O1O-76.49*硼酸H3BO35.81O-1O9.24氢氟酸HF3.531O-43.45过氧化氢H2O22.41O-1211.62次氯酸HClO2.951O5 (291K)4.53次溴酸HBrO2.O61O-98.69次碘酸HIO2.31O-111O.64碘酸HIO31.691O1O.77砷酸 H3AsO4 K1=5.62lO-3 (291K) 2.25K2l.7OlO76.77K3=3.951O1211.4O亚砷酸HAsO261O-1O9.22铵离子NH4+5.561O-1O9.25氨水NH3H2O1.791O54.75联胺N2H48.911O76.O5羟氨NH2OH9.121O-98.O4氢氧化铅Pb(OH)29.61O43.O2氢氧化锂LiOH6.311O-1O.2氢氧化铍 Be(OH)21.781O65.75BeOH+2.511O98.6氢氧化铝A1(OH)35.O11O-98.3 Al(OH)2+1.991O-1O9.7氢氧化锌Zn(OH)27.941O-76.1氢氧化镉Cd(OH)25.O11O111O.3*乙二胺 H2NC2H4NH2 K1=8.5lO54.O7K2=7.llO-87.15*六亚甲基四胺(CH2)6N41.351O-98.87*尿素CO(NH2)21.31O1413.89*质子化六亚甲基四胺(CH2)6N4H+7.11O-65.15甲酸HCOOH 1.771O-4 (293K)3.75氯乙酸ClCH2COOH1.4O1O-32.85氨基乙酸NH2CH2COOH1.671O-1O9.78*邻苯二甲酸C6H4(COOH)2K1=1.121O-3 2.95 K2=3.911O-65.41柠檬酸 (HOOCCH2)2C(OH)COOH K1=7.l1O-4 3.14K2=1.681O-5 (293K)4.77K3=4.11O-76.39a-酒石酸 (CH(OH)COOH)2 K1=1.O41O-32.98K2=4.551O-54.34*8-羟基喹啉 C9H6NOH K1=8lO-65.1K2=11O-99.O苯酚C6H5OH 1.281O-1O (293K)9.89*对氨基苯磺酸 H2NC6H4SO3H Kl=2.6lO-lO.58K2=7.61O-43.12*乙二胺四乙酸(