Question detail
What happens to the ionic structure of a compound when it is dissolved in water?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
How bonding and structure are related to the properties of substances
Question
- A. It forms a solid precipitate
- B. It dissociates into free ions
- C. It remains unchanged
- D. It becomes a gas
Answer
The correct option is It dissociates into free ions. This answer is correct because it matches the approved learning objective to explain why ionic compounds dissolved in water conduct electricity in the subtopic Properties of ionic compounds.
Explanation
The correct option is It dissociates into free ions. It dissociates into free ions is correct because it directly supports the approved learning objective to explain why ionic compounds dissolved in water conduct electricity. This belongs to the subtopic Properties of ionic compounds within How bonding and structure are related to the properties of substances, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Properties of ionic compounds.
Common mistake
Conductivity of Ionic Compounds in Water
Students often state that ionic compounds conduct electricity in water because the ions are free to move, but they do not mention that the ionic compound must first dissolve in water.
Emphasize that ionic compounds must dissolve in water to separate into ions, which then allows them to conduct electricity due to their mobility.
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