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 O.O1 O.OO3m-1ol L-1 , 温度 298K)名称醋酸碳酸草酸亚硝酸磷酸亚硫酸硫酸硫化氢氢氰酸铬酸*硼酸氢氟酸过氧化氢HAcH2CO3H2C2 O4HNO2H3PO4H2SO3H2SO4H2SHCNH2CrO 4H3BO3HFH2O2次氯酸HClO次溴酸HBrO次碘酸HIO碘酸HIO 3砷酸H3AsO 4亚砷酸HAsO2NH4铵离子+氨水NH3 H2 O化学式解离常数， K1.76 1O-54.75K1 =4.3O lO 76.37 11K2 =5.61 1O 111O.25-2K1 =5.9O lO1.23-5K2 =6.4O lO4.19pK4

2、.6 1O 4 (285.5K)-3K1 =7.52 lO8K2 =6.23 1OK3 =2.2 lO 13 (291K)3.372.127.2112.67K1 =1.54-2 lO(291K)1.81-76.91K2 =1.O2 lOK2 =l.2O lO 21.92K1 =9.llO 8(291K) 7.O4K2 =l.l-121O 1O11.969.314.93 1OK1 =1.8-1 lO -1O.74K2 =3.2O 1O-75.8 1O-1O3.53 1O-42.4 1O-1252.95 1O (291K)2.O6 1O-92.3 1O-111.69 1O 1K1 =5.62 lO

3、 -3 (291K)K2 l.7O lO 7K3 =3.95 1O 126 1O-1O5.56 1O-1O51.79 1O6.499.243.4511.624.538.691O.64O.772.256.7711.4O9.229.254.75联胺N2H48.91 1O -96.O5羟氨NH2OH9.12 1O48.O4氢氧化铅Pb(OH) 29.6 1O -13.O2氢氧化锂LiOH6.31 1O6O.2氢氧化铍Be(OH) 2+1.78 1O 95.75BeOH2.51 1O -98.6氢氧化铝A1(OH) 3+5.O1 1O-1O8.3Al(OH) 21.99 1O-1O-79.7氢氧化锌Z

4、n(OH) 27.94 1O 116.1氢氧化镉Cd(OH) 25.O1 1O 5 1O.3* 乙二胺H2NC2 H4 NH2K1 =8.5 lO -84.O7K2 =7.l lO-97.15* 六亚甲基四胺(CH 2) 6N41.35 1O148.87*尿素CO(NH 2) 2+1.3 1O 13.89* 质子化六亚 甲基四胺(CH 2) 6N4H-67.1 1O-45.15甲酸HCOOH1.77 1O (293K)-33.75氯乙酸ClCH 2COOH1.4O 1O2.85氨基乙酸NH2CH2COOH-1O1.67 1O-39.78* 邻苯二甲酸C6H4 (COOH) 2K1 =1.12 1O-32.95-6K2 =3.91 1O-45.41柠檬酸(HOOCCH 2) 2 C(OH)COOHK1 =7.l 1O-53.14K2 =1.68 1O (293K)4.77K3 =4.1 1O6.39- 酒石酸(CH(OH)COOH) 2K1 =1.O4 1O-52.98K2 =4.55 1O4.34*8- 羟基喹啉C9H6 NOH-6 K1=8 lO5.1-9K2=1 1O9.O苯酚C6H5 OH-1O1.28 1O(293K)9.89* 对氨基苯磺 酸H2NC6 H4 SO3H-lKl =2.6 lOO.58-4K2 =7.6 1O3.12* 乙二胺四乙