4 factors that contribute to/change reaction rate - 1) concentration
2)reactant phase
3)temperature
4)catalyst
if their is a plot of concentration over time of the reaction A--> 2B+C.Describe what the graph would
look like. - A's slope would be exponentially negative since it is a reactant. Both B and C's slope would be
exponentially positive since they are both products but Bs slope/line would be 2x C's due to coefficients.
Steps To determine the initial rate from a graph - 1) Find a point on line and then another point close to
it
2)find slop of those two points
how do you find instantaneous rate? - take the slope of the line tangent to the point
how do you find average rate? - take the slop of the two points (the certain start point and the certain
end point that are given to you)
Steps to writing a rate expression - 1) write delta molecule/delta Time
2) add - sign for reactants and + sign for products
3)use coefficients to form ratios
4) set all expressions equal to each other
Writing a rate law - rate=k[A]^x[B]^y
where:
rate is the initial rate of reaction
k is the constant (slope of linear line)
A and B are reactants
, x and y are the order of each reactant (0,1,2 or 3)
order of reactants - zero order (no relationship to initial rate)[A]^0
1st order (direct relationship to initial rate)[A]^1
2nd order [A]^2
Steps to determine order of reaction - 1) compare reactant A to initial rate when reactant B is the
same/constant
overall order of reaction - all reactant orders added together
Steps to determine order of reactions based on table - 1) compare reactant A to initial rate when B is the
same/constant
2) do the same but with B
unit of K when reaction order is 0 - Ms^(-1)
units of K when reaction order is 1 - s^(-1)
units of K when reaction order is 2 - M^(-1)s^(-1)
units of K when reaction order is 3 - M^(_-2)s^(-1)
units of K when reaction order is 4 - M^(-3)s^(-1)
initial rate of reaction - The rate of reaction at time t = 0 s. Used to compare the effect on the rate of
changing the independent variable.
plot of initial rate of reaction - concentration (A) vs time
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