Strong Acid/Base Weak Acid/Base


Strong acid - ionise/dissociate completely producing H+ ion

Strong base - ionise/dissociate completely producing OH- ion

All are in ions state, No molecule left

Strong electrolyte with high conductivity  


Weak acid - ionise/dissociate partially producing H+ ion

Weak base - ionise/dissociate partially producing OH- ion

Most in undissociated molecule form

Poor electrolyte with low conductivity

HCl → H+ + Cl- CH3COOH ⇌ H+ + CH3COO-

Stronger acids and bases have ionization equilibrium positions farther to the right.

Weaker acids and bases have equilibrium positions farther to the left.

Thus, in water, strong acids or bases will ionize more than weak acids or bases.