Section: Science

92) Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will conduct an electric current. When an electrolyte forms into a solution, it dissolves or dissociates into ions, a process called ionization. If a substance does not ionize, it will not conduct an electric current.

Electrolytes include most acids, bases, and salts. Some conductors include hydrogen and sodium chloride, copper sulfate, and potassium nitrate. Substances that are not electrolytes include distilled water, sugar water, and most organic compounds.

Which of the following is a nonelectrolyte?

1. HNO₃ (nitric acid)
   
2. HCL (hydrochloric acid)
   
3. H₂SO₄ (sulfuric acid)
   
4. C₃H₈ (propane gas)
   
5. NaCl (table salt)
   

Propane (C₃H₈) is an organic compound. HNO₃, H₂SO₄ and HCL are acids. NaCl is a salt.