Final answer:
Potassium hydroxide (KOH) is highly soluble in water, dissociating into potassium and hydroxide ions, such as yielding [OH-] = 0.0125 M in a dilute solution, confirming its solubility status.
Step-by-step explanation:
Is Potassium Hydroxide Soluble in Water?
Potassium hydroxide (KOH) is an inorganic compound that is highly soluble in water. Its solubility is due to its nature as a strong base, which when in contact with water, undergoes a highly exothermic dissolution that leads to the complete dissociation of its ions. When dissolved in water, KOH dissociates into potassium (K+) and hydroxide (OH-) ions, demonstrating its solubility. For instance, if potassium hydroxide is added to water, it will yield a solution with a concentration of OH- ions, such as [OH-] = 0.0125 M in a dilute solution, indicating its high solubility.
Related Compounds' Solubility
- Magnesium hydroxide (Mg(OH)2) is generally insoluble in water.
- Potassium bromide (KBr) is soluble in water.
- Lead(II) nitrate (Pb(NO3)2) is soluble in water.
According to solubility rules, hydroxides are typically insoluble, except when paired with alkali metals (such as potassium in KOH) or certain alkaline earth metals, which makes them soluble. Therefore, KOH is soluble in water.