# What are strong and weak bases?

a strong base is a compound that in water is completally dissociated in a cation and in one or more $O {H}^{-}$ ions.
Bases of alcaline earth metals are quite strong but it is not easy mesure its force because of their not big solubility in water. The stronger is $B a {\left(O H\right)}_{2}$
All the other bases are middle or weak, and except for ammonia $N {H}_{3} + {H}_{2} O = N {H}_{4}^{+} + O {H}^{-}$ and organic amines, they are little or very little soluble