Rate of reaction Flashcards
What is the rate of reaction equation?
Rate of reaction = 1/a d(A)/dt
What are the two types of rate?
Instantaneous - at a point in time
Average - over a period of time
What are the factors that affect rate of reaction?
Nature of reaction Temperature Action of light State of reactants Concentration Catalysts
What are catalysts?
A compound that increases the rate of reaction and is not used up - reformed
What does zero order mean?
The concentration of the reactant has no effect on rate of reaction
What does first order mean?
The concentration of the reactant is proportional to the rate of the reaction
What does second order mean?
The concentration of the reactant squared is proportional to the rate of reaction
What is the rate equation?
Rate = k[a][b]
What is the rate constant?
A constant in the rate equation which provides information about the nature of the reaction and the temperature
What is the unit for a first order reaction?
s -1
What is the unit for a zero order reaction?
mol L-1 s-1
What is the unit for a second order reaction?
L mol -1 s-1
What is the unit for a third order reaction?
L2 mol-2 s-1
What is the integrated rate law equation for a first order reaction?
ln([R]) = ln([R])o - kt [R] = [R]o x e^-kt
How do we check if a reaction is first-order?
A plot of ln[R] on the y axis and time on the x-axis should show a gradient of -k with a y-intercept of ln[R]o