Multiple Choice
When a strong electrolyte such as NaCl dissolves in water, does the number of ions in solution increase compared to dissolving a weak electrolyte like acetic acid (CH3COOH)?
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6. Chemical Quantities & Aqueous Reactions
Electrolytes
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Which of the following compounds is a nonelectrolyte?
A
C_6H_{12}O_6 (glucose)
B
HCl (hydrochloric acid)
C
KNO_3 (potassium nitrate)
D
NaCl (sodium chloride)
Verified step by step guidance1
Understand the definition of an electrolyte: an electrolyte is a substance that dissociates into ions when dissolved in water, allowing the solution to conduct electricity.
Identify the nature of each compound: HCl is a strong acid that ionizes completely into H\_3O\^+ and Cl\^- ions; KNO\_3 and NaCl are ionic salts that dissociate into their respective ions in solution.
Recognize that C\_6H\_{12}O\_6 (glucose) is a molecular compound that dissolves in water but does not ionize or dissociate into ions.
Conclude that since glucose does not produce ions in solution, it does not conduct electricity and is therefore a nonelectrolyte.
Summarize that the key difference is whether the compound produces ions in solution (electrolyte) or remains as neutral molecules (nonelectrolyte).
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