NaOH is a base. When it is dissolved in water, it breaks into two ions, Na+ and OH-. And any compound that releases OH- ion in an aqueous solution is considered a base. Sodium hydroxide (NaOH) has a pH value of 12, which shows its basic nature. NaOH is one of the important bases used in various industrial applications. Acid-base indicators are either weak organic acids or weak organic bases. The equilibrium in a solution of the acid-base indicator methyl orange, a weak acid, can be represented by an equation in which we use HIn as a simple representation for the complex methyl orange molecule: HIn ( aq) ⏟ red + H 2O ( l) ⇌ H 3O + ( aq) + In − ( aq Weak Base: It is actually a base, which upon the dissolution in the water will not dissociate or ionize completely . So, the solution will contain only a small amount or proportion of the Hydroxide ions ( OH -). NH 4 OH is actually a weak base as when it is dissolved in the water it will ionize partially or in the small amount. Many inorganic substances which bear the word hydroxide in their names are not ionic compounds of the hydroxide ion, but covalent compounds which contain hydroxy groups . Hydroxide ion The hydroxide ion is naturally produced from water by the self-ionization reaction: [1] H 3 O + + OH − ⇌ 2H 2 O An example of a buffer that consists of a weak base and its salt is a solution of ammonia (\(\ce{NH3(aq)}\)) and ammonium chloride (\(\ce{NH4Cl(aq)}\)). It is a buffer because it also contains the salt of the weak base. If we add a base (hydroxide ions), ammonium ions in the buffer react with the hydroxide ions to form ammonia and water and zCa5B.

which hydroxide is a weak base