Acids & Bases - Chemistry

Acid Dissociation Constants and pK a ValuesAcids & Bases 10Acid HA A - K a pK ahydroiodic HI I − ∼10 10 ∼ −10hydrobromic HBr Br − ∼10 10 ∼ −10perchoric HClO 4 ClO 4−∼10 8 ∼ −8hydrochoric HCl Cl − ∼10 8 ∼ −8sulfuric H 2 SO 4 HSO 4−∼10 8 ∼ −8nitric HNO 3 NO 3−∼10 8 ∼ −8trichloroacetic Cl 3 COOH Cl 3 COO − 2 × 10 −2 0.7oxalic HOOCCOOH HOOCCOO − 5.9 × 10 −2 1.2sulfurous H 2 SO 3 SO 32−1.5 × 10 −2 1.8sulfuric (2nd H + ) HSO 4- SO 42−1.2 × 10 −2 1.9phosphoric H 3 PO 4 H 2 PO 4−7.5 × 10 −3 2.1nitrous HNO 2 NO 2− 4.6 × 10 −4 3.3hydrofluoric HF F − 3.5 × 10 −4 3.5formic HCOOH HCOO − 1.8 × 10 −4 3.8benzoic C 6 H 5 COOH C 6 H 5 COO − 6.5 × 10 −5 4.2oxalic (2nd H + ) HOOCCH 2 COO − − OOCCH 2 COO − 6.4 × 10 −5 4.2acetic CH 3 COOH CH 3 COO − 1.7 × 10 −5 4.7carbonic H 2 CO 3 HCO 3− 4.3 × 10 −7 6.4hydrogen sulfide H 2 S HS - 9.1 × 10 −8 7.1phosphoric (2nd) H 2 PO 4− HPO 42−6.2 × 10 −8 7.2ammonium ion NH 4+ NH 3 5.6 × 10 −10 9.2hydrocyanic HCN CN - 4.9 × 10 −10 9.3