average rate of reaction

Average rate of reaction

Change in volume/mass/concentration

Units

X s-1

1/time

For a colour change/ disappearing cross

Change that happens caused by relative differences

Rate of reaction graphs axis

Amount of reactant over time

Average rate of reaction

Tangent at given time

Rate equations

How rate is affected by concentration or reactants

ΔConcentration^order

ΔRate of reaction

Units of K

Range but ends in S^-1

How to get rate equation

Monitoring initial rate when changing concentration of each reaction individually

Table method

Calculate K

Then calculate changes and order level

Concentration-time graph

gradient at different points to calculate rate

Zero order

Horizontal line (gradient = 0)

Rate - concentration graph doesn’t affect rate order = 0

First order

Rate concentration graph straight line going through origin so rate is directly proportional to concentration, order = 1

Second order

Rate concentration is curved rate is proportional to to [ ]² so order = 2

Overall rate

Determined by rate determining step

Rate determining step

Slowest step

Identifying RDS

Up to RDS are in equation

Intermediate (made and used up) are not included

Catalysts are not in overall equation

Order = number of times molecule appears