Which of the following substances is a strong electrolyte? A)CH₃CH₂OH B)C₆H₆ C)KOH D)SO₂ E)PCl₃

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A strong electrolyte dissociates completely into ions in solution, and potassium hydroxide (KOH) is a salt that fully dissociates in water to form K+ and OH- ions. The other choices either do not dissociate completely (i.e. weak electrolytes) or do not ionize at all in solution (i.e. non-electrolytes).

Which of the Following Substances Is a Strong Electrolyte