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1、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 K1=4.3OlO76.37碳酸 H2CO3 K2=5.611O111O.25 K1=5.9OlO-21.23草酸 H2C2O4 K2=6.4OlO-54.19亚硝酸HNO2 4.61O4 (285.5K)3.37 K1=7.52lO-32.12 K2=6.231O87.21磷酸 H3PO4 K3=2.2lO13 (291K) 12.67 K1=1.54lO-2 (291K) 1.81亚硫酸 H2SO3 K2=1.O2lO-76.91硫酸H2SO4K2=l
2、.2OlO21.92 K1=9.llO8 (291K) 7.O4硫化氢 H2S K2=l.l1O-1211.96氢氰酸HCN4.931O1O9.31 K1=1.8lO-1O.74铬酸 H2CrO4 K2=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 K1=5.62lO-3 (291K) 2.25 K2l.7OlO76.77砷酸 H3AsO4
3、K3=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.2Be(OH)21.781O65.75氢氧化铍 BeOH+2.511O98.6氢氧化铝A1(OH)35.O11O-98.3Al(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 K1=8.5lO54.O7*乙二胺 H2NC2H4
4、NH2 K2=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 K1=1.121O-3 2.95 *邻苯二甲酸C6H4(COOH)2K2=3.911O-65.41 K1=7.l1O-4 3.14 K2=1.681O-5 (293K)4.77柠檬酸 (HOOCCH2)2C(OH)COOH K3=4.11O-7
5、6.39 K1=1.O41O-32.98-酒石酸 (CH(OH)COOH)2 K2=4.551O-54.34 K1=8lO-65.1*8-羟基喹啉 C9H6NOH K2=11O-99.O苯酚C6H5OH 1.281O-1O (293K)9.89 Kl=2.6lO-lO.58*对氨基苯磺酸 H2NC6H4SO3H K2=7.61O-43.12 K5=5.41O-76.27 *乙二胺四乙酸(EDTA) (CH2COOH)2NH+CH2CH2NH+(CH2COOH)2 K6=l.121O-111O.95摘自 R.C.Weast,Handbook of Chemistry and Physics D- 165,7Oth. edition ,1989199O *摘自其他参考书。
