常见弱电解质电离平衡常数表

1、弱电解质的解离常数 （近似浓度0.01O.OO3mol L-1,温度298K)化学式解离常数，KpK醋酸HAc1.76 X 1O-54.75碳酸H2CO3K1=4.3O X lO 76.37K2=5.61 X 1O 111O.25草酸H2C2O42=5.90 X IO-21.23K2=6.4O X lO -54.19亚硝酸HNC24.6 X 1O4 (285.5K)3.37磷酸H3PO4K1=7.52 X IO-32.12K2=6.23 X 1O 飞7.21K3=2.2 X lO 13 (291K)12.67亚硫酸H2SO3K1=1.54 X IO-2 (291K)1.81K2 = 1.O2

2、X IO-76.91硫酸H2SO4K2 = l.2O X lO21.92硫化氢H2SK1=9.l X IO 飞(291K)7.O4K2 = l.lX 1O-1211.96氢氰酸HCN4.93 X 1O1O9.31铬酸H2CrO4K1=1.8 X IO -1O.74K2=3.2O X 1O-76.49*硼酸H3BO35.8 X 1O-1O9.24氢氟酸HF3.53 X 1O-43.45过氧化氢H2O22.4 X 1O-1211.62次氯酸HClO2.95 X 1O5 (291K)4.53次溴酸HBrO2.O6 X 1O-98.69次碘酸HIO2.3 X 1O-111O.64碘酸HIO31.69

3、X 1O rO.77砷酸H3ASO4K1=5.62 X IO -3 (291K)2.25K2 = I.7O X IO76.77K3=3.95 X 1O1211.4O亚砷酸HASO26 X 1O-1O9.22铵离子NH4 +5.56 X 1O-1O9.25氨水NH3 - H2O1.79 X 1O4.75联芫N2H48.91 x 1O 76.O5羟氨NH20H9.12 x 1O-98.O4氢氧化铅Pb(OH) 29.6 x 1O 43.O2氢氧化锂LiOH6.31 x 1O-1O.2氢氧化铍Be(OH) 21.78 x 1O 65.75BeOH+2.51 x 1O 飞8.6氢氧化铝A1(OH) 3

4、5.O1 x 1O-98.3Al(OH) 2+1.99 x 1O-1°9.7氢氧化锌Zn(OH) 27.94 x 1O-76.1氢氧化镉Cd(OH) 25.O1 x 1O 一111O.3*乙二胺H2NC2H4NH2K1=8.5 x IO54.O7K2=7.l x lO -87.15*六亚甲基四胺(CH 2) 6N41.35 x 1O-98.87*尿素CO(NH2) 21.3 x 1O1413.89*质子化六亚甲基四胺(CH 2) 6N4H+7.1 x 1O-65.15甲酸HCOOH1.77 x 1O-4 (293K)3.75氯乙酸CICH 2COOH1.4O x 1O-32.85氨基

5、乙酸NH2CH2COOH1.67 x 1O-1O9.78*邻苯二甲酸C6H4(COOH) 2K1=1.12 x 1O-32.95K2=3.91 x 1O-65.41柠檬酸(HOOCCH2) 2C(OH)COOHK1=7.l x 1O-43.14K2=1.68 x 1O-5 (293K)4.77K3=4.1 x 1O-76.39-酒石酸(CH(OH)COOH) 2K1=1.O4 x 1O-32.98K2=4.55 x 1O-54.34*8-羟基喹啉C9H6NOHK1=8 x lO -65.1K2=1 x 1O-99.O苯酚C6H5OH1.28 x 1O-1O (293K)9.89*对氨基苯磺酸H

6、2NC6H4SO3HKl =2.6 x lO -lO.58K2=7.6 x 1O-43.12*乙二胺四乙酸(EDTA)(CH 2COOH)2NH+CH2CH2NH+ (CH 2 COOH)2K5=5.4 x 1O-76.27K6=l.12 x 1O-111O.95弱电解质的解离常数 （近似浓度 0.0卜O.OO3molL-1,温度298K)化学式解离常数，KPK醋酸HAc1.76X 1Q54.75碳酸H2CQ心=4.30 X 10-76.37K2=5.61X 1CT1110.25早酸H2C2O4Ki=5.9O X Q21.23K2=6.4OX l0-54.19亚硝酸HNQ4.6 X 1CT4

7、(285.5K)3.37磷酸H3PO4K1=7.52 X lC-32.12K2=6.23 X 1O87.21K3=2.2 X IO 13(291K)12.67亚硫酸H2SQ3K1=1.54X lO-2 (291K)1.81K2=1.O2X Q76.91硫酸H2SQ4K2=L2O X Q21.92硫化氢H2SK1=9.l X l08 (291K)7.04K2=l.l x 10211.96氢氰酸HCN4.93 X 10109.31铬酸fCrQK1=1.8X lO-10.74K2=3.2O X 1d6.49*硼酸H3BQ5.8 X 10O9.24氢氟酸HF3.53 X 1C43.45过氧化氢H2Q2

8、2.4X 10211.62次氯酸HClO2.95X 105 (291K)4.53次溴酸HBrO2.O6X 1098.69次碘酸HIO2.3 X 10110.64碘酸HIQ31.69X 1010.77砷酸H3ASQK1=5.62 XlO-3(291K)2.25K2= l.70X l076.77K3=3.95 X 101211.40亚砷酸HAsQ6X 1O109.22铵离子NH4+5.56X 1O109.25氨水NH3 HQ1.79X 1054.75联胺N2H48.91X 1O76.O5羟氨NH2OH9.12X IC98.O4氢氧化铅Pb(OH)9.6X 1O 43.O2氢氧化锂LiOH6.31X

9、 101O.2氢氧化铍Be(OH21.78X 1O65.75BeOH2.51X 1O98.6氢氧化铝A1(OH35.O1X 1O98.3ai(oh)2+1.99X 1。29.7氢氧化锌Zn(OH27.94 X 1C76.1氢氧化镉Cd(OH>5.O1X 1CT111O.3*乙二胺h2nc2h4nh2Ki=8.5 X IO-54.O7K2=7.l X IO87.15* 六亚甲基四胺(CH2)6N41.35X 1O98.87*尿素CO(NH>)21.3X 101413.89* 质子化六亚甲基四胺(CH2)6N4H +7.1X 1O55.15甲酸HCOOH1.77X 1C4 (293K)

10、3.75氯乙酸CICH2COOH1.4OX 1O32.85氨基乙酸nh2ch2cooh1.67X 1O1。9.78*邻苯二甲酸CjH4(COOH2K1=1.12X 1O2.95K2=3.91 X 1O55.41柠檬酸(HOOCCH)2C(OH)COOHK1=7.I X 1O43.14K2=1.68X 1O (293K)4.77K3=4.1X 1C76.39-酒石酸(CH(OH)COOHK1=1.O4X12.98K2=4.55X K-54.34*8-羟基喹啉CANOHK1=8 X IO-65.1K2=1X 1O39.O苯酚C6H5OH1.28X 1OO (293K)9.891、一些固体的密度（常温常压）物质密度(kg / m 3 )物质密度(kg / m 3)铂21.4 X10 3铝2.7 X10 3金19.3 X10 3花岗岩(2.6-2.8) X10 3铅11.3 X10 3砖(1.4-2.2) X10 3银10.5 X10 3冰0.9 X10 33(0 C)3铜8.9 X10蜡0.9 X10钢、铁7.9 X10 3干松木0.5 X10 32、一些液体的密度（常温常压）物质密度(kg / m 3 )物质密度(kg / m 3)水银313.6 X10植物油30.9