Final answer:
The correct chemical formula for potassium hydroxide is KOH, where potassium (K) and hydroxide (OH) ions come together balancing out their charges to form the compound.
Step-by-step explanation:
The formula that matches the name potassium hydroxide is KOH. This is because potassium (K) forms a +1 ion and hydroxide (OH) forms a -1 ion. When these ions come together to form an ionic compound, the charges balance out to give the neutral compound KOH, which is commonly referred to as caustic potash and is a strong base known for its reactivity toward acids and its corrosive nature.