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Reaction kinetics G12
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Homogeneous catalyst bcs same phase with reactants
Explain the steps in heterogeneous catalysis
Diffusion, adsorption, reaction, desorption, diffusion
State the order for the following picture
Second order
What is the general rate reaction equation for blue line?
Rate = k [A]^1
What is the definition of half life (t1/2) ?
The time taken for the amount (or concentration) of the limiting reactant in a reaction to decrease to half its initial value
Why half life for the first order reaction is independent of concentration?
t1/2 = 0.693 / k, not depended on concentration
What is the order for each concentration below
[D]^0 [E]^1
Answer this question below
2A + B—> D ; 1st equation. Its means the rate of reaction is determined by the concentration of A and B in the first step ; rate =k[A][B]
Write the overall reaction & identify any catalyst and intermediate on this reaction!
2H2O —> 2H2O + O2 ; cat= I^- intermediate =IO^-; biomolecular; rate=k [H2O2]
Answer this question
Rate = k [O2] [NO]^2 ; unit of k is dm^6 mol^-2 s^-1
Write the rate equation for this reaction and state the overall order for the reaction
Rate=k[B]^2 [C] ; overall order =3; unit of k = dm^6 mol^-2 s^-1
State the unit of rate constant
Unit of k = s^-1
Use this data to calculate the rate constant [H2O2]=0.03 M, [I^-1] = 0.01 M, initial rate of reaction 5.30 x 10^-6. The rate equation for this reaction is k [H2O2] [I^-1]
0.0177 mol dm^3 mol^-1 s^-1
A first order reaction has a rate constant of 9.63x10^-5 s^-1. Calculate a value for the half life of this reaction.
7200
Use the formula t1/2 = 0.693/k to calculate a value for the rate constant of a reaction which is first order and has a half life of 480 s
1.44 x10^-3 s^-1
We can identify the order of a reaction in three ways. Explain it!
plot a graph of reaction rate against concent of reactant, graph of concent of reactant against time & Deduce successive t1/2 from graphs of concent x time
State the unit k corresponding to the following rate equation, rate = k[H2][I2]^2
k = s^-1 mol^-2 dm^6
Explain 3 factors that effectively increase reaction rate !
-the concentration of the reactants are increased -the temperature is increased -a catalyst is added to the reaction mixture
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