Question detail
What role does hydrochloric acid play in the reaction with sodium thiosulfate?
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. It acts as a catalyst.
- B. It is a reactant.
- C. It is a product.
- D. It has no effect on the reaction.
Answer
It is a reactant.
Explanation
The correct answer is It is a reactant.. This answer directly addresses the question: What role does hydrochloric acid play in the reaction with sodium thiosulfate? 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.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.