Order of reaction
The power which the concentration of the reactant is raised to in the rate equation
Rate of reaction
Rate of change of concentration of reactants or products (units are mol dm-3 s-1)
Rate constant, k
The constant that links the rate of reaction with the concentration of the reactants raised to the powers of their orders in the rate equation
Half-life
The time taken for the concentration of a reactant to reduce by half
Rate-determining step
The slowest step in the reaction mechanism of a multi-step reaction
- how would you find the rate of reaction from a concentration/time graph
Draw a tangent to the curve at the required time and measure the gradient of the tangent
- initial rate of reaction
Rate of reaction (previous definition) when t=0
- half life of first order reaction
Independent of concentration
- how would you know if a reaction is single or multi-step?
The order of reactants in the rate equation would (match/not match) the stoichiometry of the reactants in the balanced chemical equation
