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SingaporeChemistryQuick questions

Physical Chemistry

Quick questions on Reaction kinetics, rate equations and mechanism: Singapore A-Level H2 Chemistry

4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is the rate constant?
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The rate constant kk is found by substituting one experimental run into the rate equation. Its units depend on the overall order:
What is q1?
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State two factors that increase the rate of a reaction and explain each using collision theory. [3 marks]
What is q2?
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A first-order reaction has a half-life of 4040 s. Calculate the rate constant. [2 marks]
What is q3?
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For rate=k[X]2[Y]\text{rate} = k[\text{X}]^2[\text{Y}], state the overall order and the units of kk. [2 marks]

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