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A Level Edexcel Chemistry - Topic 16 - Kinetics 2/II

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A Level Edexcel Chemistry - Topic 16 - Kinetics 2/II Fully updated notes providing drop down answers to self made questions designed from numerous textbooks and exam mark schemes. During my revision, I created these drop down questions and answers by extracting the key information needed to a...

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  • December 26, 2022
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Topic 16 - Kinetics 2
Reaction Rates
Define reaction rate

the reaction rate is the change in the amount of reactants or products per
unit time

Name the main 6 methods of continuous monitoring to follow the rate of a
reaction

gas volume

loss of mass

colour change

change in pH

titration

electrical conductivity

Outline a titrimetric method to measure the change in concentration of an
alkali with time

take samples at various times



Topic 16 - Kinetics 2 1

, then titrate with acid of known concentration using an indicator

Suggest why rate the above exothermic reaction could be higher than
expected

rate is higher than expected as it is exothermic so heat energy is released
during the reaction so there are more collisions with energy larger than the
activation energy


Orders of Reaction
What is the zero order?

when concentration doubles there is no change in rate of reaction

What is the first order?

when concentration doubles, the rate of reaction also doubles

What is the second order?

when concentration increases by 3 times, the rate of reaction increases by 9
times

Give the shapes of a concentration-time graph and a rate-concetration graph
for a zero order reaction




Topic 16 - Kinetics 2 2

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