5.1 Rates Equilibrium And pH Flashcards
What is rate of reaction?
-is the change in concentration of a reactant or product per unit time
The ____________ with respect to a reactant is the power to which the concentration of the reactant is raised in a rate equation
ORDER
What is the rate constant?
-the rate constant (k)
-is 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
What is the rate equation?
-the rate equation for a reaction A+B—> C is given by :
Rate=k[A]^m [B]^n
-where m is the order of reaction with respect to A and n is the order of reaction with respect to B
What is the overall order of a reaction?
-the sum of the individual orders
-m+n
What is the equation for rate of reaction?
Rate of reaction(moldm^-3s^-1). = change in concentration of reactant or product
———————————————————————————
Time
What is zero order?
-if the order is 0 with respect to reactant A ,then: rate ∝[A]^0
-the rate is unaffected by changing the concentration of A
-remember any number to the power of 0 is 1
What does the symbol ∝ mean?
-proportional
What is first order?
-if the order is 1 with respect to a reactant A, then: rate ∝ [A]^1
-the rate is DIRECTLY PROPORTIONAL to the concentration
->if [A] increases by 2 times the rate also increases by 2 times
-> if [A] increases by 3 times the rate also increases by 3 times
What is second order?
-if the order is 2 with respect to a reactant A then : rate ∝[A]^2
-the change in rate will be equal to the change in concentration squared
->if [A] increases by 2 times the rate increases by 2^2=4 times
->if [A] increases by 3 times the rate increases by 3^2=9 times
What is the rate equation?
Rate=k[A]^x[B]^y[C]^z
-k=rate constant
-A-concentration of reactant A
-B-concentration of reactant B
-C-concentration of reactant C
-x,y,z-orders of reaction for each reactant
