Question detail
A solution of hydrochloric acid reacts with sodium thiosulfate. If 50 g of sodium thiosulfate is used and the reaction takes 10 seconds, calculate the mean rate of reaction in g.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Rate of reaction
Question
A solution of hydrochloric acid reacts with sodium thiosulfate. If 50 g of sodium thiosulfate is used and the reaction takes 10 seconds, calculate the mean rate of reaction in g.
Answer
5 g/s
Explanation
The correct answer is 5 g/s. This is correct because it matches the rate of reaction, reversible reaction, equilibrium, catalyst, or Le Chatelier concept tested by this approved Chemistry 8462 learning objective. The other options are incorrect because they change the quantity, unit, condition, graph interpretation, or chemical relationship in the question.
Common mistake
Misunderstanding Concentration Effects
Students often think that increasing concentration only increases the amount of reactants without affecting the rate of reaction.
Emphasize that increasing concentration increases the number of particles in a given volume, leading to more frequent collisions and thus a higher reaction rate.
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