Strong Acid Dissociation Constants at 25°C

Generally speaking, these values are not used in calculations since, at common concentrations in chemistry, each substance is 100% dissociated.

Acid NameFormulaKa
hydroiodicHI3.2 x 109
hydrobromicHBr1.0 x 109
perbromicHBrO43.2 x 108
perchloricHClO41.0 x 108
hydrochloricHCl1.3 x 107
sulfuric (Ka1)H2SO41.0 x 103

Strong Base Dissociation Constants at 25°C

There is significantly less information on Kb values for common strong bases than there is for the Ka for common strong acids. The closest I could find was the following sentence "Bases with pK less than zero are shown as 'strong.' " The following bases are listed as strong:

Base NameFormula
Sodium hydroxideNaOH
Potassium hydroxideKOH
Rubidium hydroxideRbOH
Cesium hydroxideCsOH
Calcium hydroxideCa(OH)2
Strontium hydroxideSr(OH)2
Barium hydroxideBa(OH)2