Question detail
What is the expected result when sodium thiosulfate is mixed with hydrochloric acid?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Rate of reaction
Question
- A. No visible change
- B. Formation of a clear solution
- C. Formation of a colored solution
- D. Formation of a cloudy yellow solution
Answer
Formation of a cloudy yellow solution
Explanation
The correct answer is Formation of a cloudy yellow solution. This answer directly addresses the question: What is the expected result when sodium thiosulfate is mixed with hydrochloric acid? It matches the approved Chemistry 8462 learning objective and the linked subtopic. The other options are incorrect because they either change the rate, catalyst, reversible reaction, equilibrium, or graph context, or they do not answer the exact point being tested.
Common mistake
Misunderstanding the Reaction Process
Students often think that the reaction between sodium thiosulfate and hydrochloric acid is instantaneous and do not recognize the gradual change in visibility as the reaction progresses.
To fix this, students should observe the reaction carefully and note the time taken for the solution to become opaque, understanding that this gradual change is a key indicator of the reaction rate.
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