Multiple Choice
In the context of electrolytes and electrochemical cells, which of the following best describes a cathode?
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6. Chemical Quantities & Aqueous Reactions
Electrolytes
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Which one of the following can be classified as a weak electrolyte?
A
acetic acid (CH_3COOH)
B
hydrochloric acid (HCl)
C
potassium nitrate (KNO_3)
D
sodium chloride (NaCl)
Verified step by step guidance1
Understand what an electrolyte is: an electrolyte is a substance that produces ions and conducts electricity when dissolved in water.
Recognize the difference between strong and weak electrolytes: strong electrolytes completely dissociate into ions in solution, while weak electrolytes only partially dissociate.
Analyze each option: hydrochloric acid (HCl), potassium nitrate (KNO_3), and sodium chloride (NaCl) are all strong electrolytes because they fully dissociate in water.
Acetic acid (CH_3COOH) is a weak acid and only partially ionizes in water, producing fewer ions compared to strong electrolytes.
Therefore, acetic acid (CH_3COOH) is classified as a weak electrolyte due to its partial ionization in aqueous solution.
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