rate equations Flashcards
what does reaction rate tell you
how fast reactants are converted to products
what is the formula for working out the reaction rate from the gradient of a graph
changing in y/change in x
how can you work out the gradient from a curved graph
you can work out the rate reaction at a certain point on the graph by drawing a tangent at a certain point and then calculating the gradient of the graph at that point
what do rate equations tell you
how the rate is affected by the concentrations of the of reactants
what is the rate equation for the reaction A+B = C+D
r = k[A]m[B]n
what do m and n tell you in terms of rate equations
the orders of reaction with respect to reactant A and reactant B. m is the concentration of reactant A and n is the concentration of reactant B
what is order of reaction defined as
the power to which the concentration of a reactant is raised in the rate equation
what is the overal order of the reaction
m+n
what can you work out orders of reactions from, and what cant you work out orders of reactions from
you can work them out from experiments and can’t work them out from chemical equations
if [A] changes but the rate stays the same what is the order of reaction
the order of reaction with respect to A is 0
if the rate is proportional to [A] then what is the order of reaction
the order of reaction with respect to [A] is 1
if the rate is proportional to [A]^2 then what is the order of reaction
the order of reaction with respecto to [A] is 2
what is k
the rate constant - the number that links the rate of the reaction to the concentration of the reactants at a particular temperature
if k has a bigger value what does that mean
the reaction would be faster
if you increase the temperature of a reaction what happens to the value of k
the value of k also increases
