Practice Isolation (Pseudo–First-Order) Method - 5.3 | Unit 6: Chemical Kinetics | IB Grade 11: Chemistry
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Isolation (Pseudo–First-Order) Method

5.3 - Isolation (Pseudo–First-Order) Method

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Practice Questions

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Question 1 Easy

Define the Isolation Method in your own words.

💡 Hint: Think about simplifying complex expressions or equations in mathematics.

Question 2 Easy

What do we assume about the concentration of the excess reactant while using the Isolation Method?

💡 Hint: Consider how holding a value constant affects equations.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does the Isolation Method assume about one of the reactants?

It is in an unequal concentration
It remains constant throughout the reaction
It is fully consumed

💡 Hint: Consider the definition of 'constant' in scientific terms.

Question 2

True or False: The Isolation Method is only applicable to reactions in gas phase.

True
False

💡 Hint: Think about different types of reactions including in liquids or solids.

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Challenge Problems

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Challenge 1 Hard

A reaction A + 2B → Products is monitored. If B initially is 5M and we observe k′ = 0.1 min^-1, find the rate constant k assuming A's concentration diminishes during the reaction. How would you validate that B's concentration remains effectively constant throughout?

💡 Hint: Solve with consideration to how different orders affect k and validate through concentration checks.

Challenge 2 Hard

If the concentration of A doubled in a reaction where B was in excess, discuss how the overall reaction rate changes in terms of the reaction order with respect to A. Provide a detailed explanation for your answer.

💡 Hint: Think about how reaction orders significantly change calculations in kinetics.

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