Definitions
A tangent line represents the _____ rate
instantaneous
The equilibrium constant is super itty bitty tiny. What can you do to make ICE table calculations easier?
Neglect x!
A reaction is third order for A and second order for B with a k of 7.6. What would be the rate of rxn if you have .5 M A and 1 M of B?
0.95 M/s
What does a catalyst do?
Increases the rate by lowering the activation energy
In an equilibrium expression, when does the reverse reaction start to form?
As soon as products start to form.
The half life of a second order reaction is 9.87 s. What would the rate constant be if your initial concentration is 7.38 M?
k=0.0137 1/M*s
These types of molecules are products of one step in the reaction, but then are used as reactants as a following step in the reaction.
Intermediates
Which states of matter are able to change in concentration? Which ones are NOT able to be included in the equilibrium expression?
Gases, aqueous
liquids, solids
The Kc for the following reaction is 34.78
2 H2I (g)--> H2(aq) + 2I (g)
What is the Kp?
34.78
Can you get the equilibrium constant powers from the balanced chemical equation?
Yes!
The amount of energy that is required for products to reach the transition state is ____
reverse activation energy
Balance the equation and then find the rates of each reactant and product given the overall reaction of 4.75E-2 M/s.
NH3 + O2 --> NO + H2O
NH3=-0.190 M/s
O2= -.238 M/s
NO= 0.190 M/s
H2O= 0.285 M/s
How can you increase the rate of reaction without changing the concentrations of reactants or adding a catalyst? What does this do to activation energy?
Temperature; nothing
Fast: 2 NO --> N2O2
Slow: N2O2 + O2 --> 2 NO2
Rate= k [NO]^2[O2]
1.5 mole quantities of each of the two reactants (NO and Cl2 were placed in a 3 L reaction chamber at a particular temperature. After equil. was established, it was found that 15% of the NO had reacted:
2NO (g) + Cl2(g) --> 2 NOCl (g)
Calculate the equilibrium constant Kc for the reaction at this temperature
0.067