Chapter 18 Flashcards
How is rate of reaction calculated?
Rate = quantity reacted or produced/time
Rate with concentration equation?
Rate = change in conc/time
Units for rate?
moldm^-3s^-1
What does [A] mean?
This is the shorthand for concentration of the substance A
0 order reaction proportionality
Rate ~ [A]^0
What does a zero order reaction mean
A zero order reaction is when the concentration has no affect on the ror
First order reaction proportionality
Rate ~ [A]^1
What does a first order reaction mean
This means that the rate of the reaction depends on its conc raised to the power of one
Example of first order reaction in the way it changes
If the conc of A is doubled the reaction rate is doubled
Second order reaction proportionality
Rate ~ [A]^2
Rate equation with two reactants A and B
Rate = k[A]^m[B]^n
K = rate constant
Overall order of a reaction
Sum of orders with respect to each reactant
How can orders be found
They can be determined experimentally by monitoring how a physical quantity changes over time in a reaction
What is the initial rate
The instantaneous rate at the beginning of an experiment when t = 0
How can conc time graphs be plotted
They can be plotted from continuous measurements taken during the course of a reaction
