Classification of acids and bases according to strength

S - solubility in g per 100ml water at 20° C D = relative density of substance (water=1) 

Values where pC3 -1 are taken to be -1 because of the upper limit of 10 mole. 

Values for pK can be found, inter alia, in Weast, Handbook of Chemistry and Physics. 

The literature sometimes gives pK values for basis instead of pKj, values the latter can then be calculated using the formula pK + pK. = 14.0. 

---