Topic 16: Further kinetics

Question 1

rate of reaction is

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

the rate equation is

Answer 2

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

Question 3

the order of a reactant species is

Answer 3

the power to which the concentration of the species is raised in the rate equation (or the coefficient of the species in the stoichiometric equation

Question 4

the overall order of a reaction is

Answer 4

the sum of all the individual orders

Question 5

the rate-determining step of a reaction is

Answer 5

the slowest step in the mechanism for the reaction

Question 6

the half-life of a reaction is

Answer 6

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

Question 7

the instantaneous reaction rate is

Answer 7

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 a zero order reaction)