Practice K (the Rate Constant) (5.2.2) - Module 5: Chemical Kinetics - IB 12 Chemistry

Practice: k (the Rate Constant)

Lesson 5.2.2Module 5: Chemical Kinetics

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9 questions

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6 sample questions

Question 1.
What does the rate constant (k) indicate about a reaction?
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Think about the relationship between reaction speed and reactant amounts.
Question 2.
Is there a fixed unit for k?
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Consider how the units of rate must match.
3Question 3.
What is the main purpose of the rate constant (k)?
- To calculate energy
- To link reaction rate to concentrations
- To determine the temperature
- To find the pressure
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Think about its role in the rate expression.
4Question 4.
True or False: The unit for the rate constant is always mol/dm³/s.
- True
- False
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Consider how different orders might yield different units.
Question 5.
For the reaction 2A + B → Products, we have rates data showing: 1. [A] = 0.1 M, [B] = 0.1 M, Rate = 1.0×10^-3 M/s; 2. [A] = 0.2 M, [B] = 0.1 M, Rate = 2.0×10^-3 M/s. Determine the rate constant k if it's first order with respect to A and second with respect to B.
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Break it down step-wise, and remember to substitute values carefully based on the data.
Question 6.
Discuss how changing the concentration of product B would affect the overall reaction rate for a zero-order reaction.
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Reflect on the definition of zero-order reactions.

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