collision theory
These are the two requirements for an effective collision.
What are sufficient energy and a favorable orientation?
Write the predicted rate law for the reaction
1A + 2B + 1C -> 2D + 1E
rate = k[A][B]2[C]
Write the overall reaction for the following mechanism:
Step 1: H2O2 + I- -> H2O + OI-
Step 2: H2O2 + OI- -> H2O + O2 + I-
2 H2O2 -> 2 H2O + O2
If a chemical reaction proceeds in a sequence of steps, the slowest step is called the
rate-determining step.
If the concentration of reactants is increased what happens to the rate
The rate increases
A short-lived structure formed during a collision is a(n)
What is transition state/activated complex
For the rate law Rate = k[A][B]2
The overall order for this reaction is _____
3rd order
What is the intermediate in the following mechanism?
Step 1: H2O2 + I- -> H2O + OI-
Step 2: H2O2 + OI- -> H2O + O2 + I-
OI-
An equation that relates reaction rate and concentrations of reactants is called
the rate law.
In reactions involving gases, reaction rates increase with these three things
temperature, pressure, concentration
Species that appear as reactant and then a product in a subsequent step are known as this
what is a catalyst
Rate = k[CHCl3]2[Cl]
If the concentration of CHCl3 doubles while the concentration of Cl2 is kept the same, the rate will
Quadruple
Write the rate law
Step 1: H2O2 + I- -> H2O + OI- (slow)
Step 2: H2O2 + OI- -> H2O + O2 + I- (fast)
rate = k[H2O2][I-]
True or False:
Catalysts do not alter the mechanism of the reaction and never appear in the rate law
False
rate laws are determined this way
experimentally
The step-by-step sequence of reactions by which the overall chemical change occurs is known as the
What is reaction mechanism
A reaction was found to be zero order wrt carbon monoxide concentration. if the [CO] is doubled, with everything else kept the same, what is effect on rate of the reaction?
No effect
What is the catalyst for the reaction?
Step 1: H2O2 + I- -> H2O + OI-
Step 2: H2O2 + OI- -> H2O + O2 + I-
I-
In a surface reaction, the rate of reaction depends on this
surface area.
A temporary union of atoms that forms after reactants have begun reacting but before products have formed is known as a(n)
activated complex.
The minimum energy required for an effective collision is called
What is activation energy?
It was experimentally determined that the rate for the reaction (A + B --> P) increased by a factor of 9 when the concentration of B was tripled. The reaction is _____order wrt B
third
What is the rate for the reaction below with a one step mechanism
2A --> B
Rate = k [A]^2
True or False:
The mechanism, rate law, and activation energy all change when a catalyst is added.
True
Which term has the same numerical value for the forward reaction as it has for the reverse reaction, but with opposite sign
delta E