16 - further kinetics

Question 1

(overall) rate of reaction

Answer 1

the change in concentration of a species divided by the time it takes for the change to occur. all reaction rates are positive

Question 2

rate equation

Answer 2

an equation expressing the mathematical relationship between the rate of reaction and the concentrations of the reactants

Question 3

order

Answer 3

of a reactant species is the power to which the concentration of the species is raised in the rate equation

Question 4

overall order

Answer 4

of a reaction is the sum of all the individual orders

Question 5

rate-determining step

Answer 5

of a reaction is the slowest step in the mechanism for the reaction

Question 6

half-life

Answer 6

of a reaction is the time taken for the concentration of a reactant to fall to one-half of its initial value

Question 7

instantaneous reaction rate

Answer 7

is the gradient of a tangent drawn to the line of the graph of concentration against time. the instantaneous rate varies as the reaction proceeds (except for zero order reactions)