Final answer:
KOH is an Arrhenius base that dissociates in water to K+ and OH- ions, with the equation: KOH(aq) → K+(aq) + OH-(aq), which makes the solution basic.
Step-by-step explanation:
According to the Arrhenius definition, an Arrhenius base is a substance that dissociates in water to yield hydroxide ions (OH-). Potassium hydroxide (KOH) is an example of an Arrhenius base. When KOH dissolves in water, it dissociates into potassium ions (K+) and hydroxide ions (OH-). Therefore, the chemical equation showing KOH as an Arrhenius base is as follows:
KOH(aq) → K+(aq) + OH-(aq)
This dissociation increases the concentration of OH- ions in the solution, making the solution basic. No acid is present in this dissociation equation since KOH itself is a base.