Question detail

Which expression should be used when the experiment measures product formed?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Rate of reaction

Question

A. quantity of product formed ? time taken
B. time taken ? quantity of product formed
C. mass of reactant left ? temperature
D. catalyst mass ? product mass

Answer

quantity of product formed ? time taken. This matches the mean-rate formula for product-formation experiments.

Explanation

quantity of product formed ? time taken is correct because the method tracks the product appearing. The distractors either reverse the formula or use variables that are not part of the mean-rate calculation.

Common mistake

Confusing Rate Calculation

Students often confuse the formula for calculating the mean rate of reaction by using the quantity of reactant instead of the quantity of product formed.

Always ensure to use the quantity of product formed divided by the time taken when calculating the mean rate of reaction.

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move