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A Level Chemistry > 18 > Flashcards

Flashcards in 18 Deck (10):
1

Rate of reaction

Change in concentration of a substance in unit time

2

Maximum order

2nd

3

Half-life

Time for concentration to fall by half

4

First order half life

Constant

5

How to derive k from a concentration-time graph?

k = ln(2) / half life

6

Gradient of a concentration-time graph

Rate

7

Gradient of a rate-concentration graph

Rate constant, k `

8

Rate determining step

The slowest step in the reaction mechanism of a multistep reaction
1. Hypothesis
2. Mechanism

9

Why is a reaction unlikely to occur in 1 step?

More than 2 species
Stoichiometry in the rate equation does not match overall equation

10

Arrhenius equation

k = Ae^(-Ea/RT)