Which of the following is the correct chemical formula for potassium hydroxide?

• A. K2O
• B. (Pt)2O
• C. KOH
• D. PtOH

Answer: (C)

Verified step by step guidance

1. Understand that potassium hydroxide is a compound made of potassium (K), oxygen (O), and hydrogen (H).
2. Recall that potassium (K) is an alkali metal that typically forms a +1 charge ion (K⁺).
3. Recognize that the hydroxide ion (OH⁻) is a polyatomic ion with a -1 charge.
4. Combine the potassium ion (K⁺) and hydroxide ion (OH⁻) in a 1:1 ratio to balance the charges, resulting in the formula \(KOH\).
5. Verify that the other options either have incorrect element symbols or incorrect ratios that do not represent potassium hydroxide.