CH3COOH ⇌ CH3COO-+H+
K=1.76×10-5
H2S ⇌ H++HS-
HCO3- ⇌ H++ CO32-
K2=5.61×10-11
K1=4.31×10-7
H2CO3 ⇌ H++HCO3-
HS- ⇌ H++ S2-
K1=9.1×10-8
K2=1.1×10-12
H3PO4 ⇌ H++H2PO4-
H2PO4 ⇌ H++HPO42-
HPO4 ⇌ H++PO43-
K1=7.5×10-3
K2=6.23×10-8
K3=2.2×10-13