Strong and Weak Acids/Bases

HCl (Hydrochloric acid)

Strong acid

HBr (Hydrobromic acid)

Strong acid

HI (hydroiodic acid)

Strong acid

HNO₃ (Nitric Acid)

Strong acid

H₂SO₄ (Sulfuric acid)

Strong acid

HClO₄ (Perchloric acid)

Strong acid

HF (Hydrofluoric acid)

Weak acid

H₃PO₄ (Phosphoric acid)

Weak acid

HC₂H₃O₂ (Acetic acid)

Weak acid

H₂CO₃ (Carbonic acid)

Weak acid

HNO₂ (Nitrous Acid)

Weak acid

H₂SO₃ (Sulfurous acid)

Weak acid

LiOH (Lithium Hydroxide)

Strong base

NaOH (Sodium Hydroxide)

Strong base

KOH (Potassium Hydroxide)

Strong base

RbOH (Rubidium Hydroxide)

Strong base

CsOH (Cesium Hydroxide)

Strong base

Ca(OH)₂ (Calcium Hydroxide)

Strong base

Sr(OH)₂ (Strontium Hydroxide)

Strong base

Ba(OH)₂ (Barium Hydroxide)

Strong base

NH₃ (Ammonia)

Weak base

CH₃NH₂ (Methylamine)

Weak base

Strong acids

HCl, HBr, HI, HNO₃, H₂SO₄, HClO₄

Strong bases

LiOH, NaOH, KOH, RbOH, CsOH, Ca(OH)₂, Sr(OH)₂, Ba(OH)₂

• Mostly group 1A attached to a hydroxide

Weak acids

HF, H₃PO₄, HC₂H₃O₂, H₂CO₃, HNO₂, H₂SO₃

Weak bases

NH₃, CH₃NH₂

• usually amines (N connected to C or H)