We can order the remaining conjugate bases by recognizing that the strength of an acid is inversely related to the strength of its conjugate base. Since from Table 14.2we havethe base strengths increase as follows:The combined order of increasing base strength isWater as an Acid and a Base• Water is amphoteric: Behaves either as an acid or as a base.• At 25°C:Kw = [H+][OH–] = 1.0 × 10–14• No matter what the solution contains, the product of [H+] and [OH–] must always equal 1.0 × 10–14 at 25°C. Characteristic of KThree Possible Situations (25oC)• [H+] = [OH–] = 10-7 M; neutral solution• [H+] > [OH–]; acidic solution• [H+] < [OH–]; basic solution