Equilibrium Lab Report
+
Unit 9: Lecture 1
The Concept of Equilibrium and the Equilibrium
Constant
+
What is equilibrium?
A
state of balance
It
can be static (like tug o war)
It
can be dynamic, like cars moving across a bridge, and like most of the reactions we will be studying
+
Chemical Equilibrium
Occurs
when opposing reactions are proceeding at equal rates
Rate
at which products form is equal to the rate at which reactants disappear
Have
the illusion that the reaction has stopped +At equilibrium, the concentrations of the reactants and products are constant, but are not necessarily equal
the reaction of iron(III) ions with thiocyanate
+Equilibrium and Rates
The
equilibrium below is two reactions:
N2O4
Forward
reaction:
Reverse
reaction: …show more content…
Which
side of the equilibrium do you think is favored in the reaction below based on the value of Kp. Justify your response.
CO (g) + Cl2 (g) ⇌ COCl2 (g)
Kp = 4.56 x 109
+
What can the equilibrium constant tell us?
A
large K indicates that there are more products than reactants at equilibrium
A
small K indicates that there are more reactants than products at equilibrium
If
If
K > 1, then it is products favored
K < 1, then it is reactants favored +
Example 3
After
mixture of hydrogen and nitrogen gases in a reaction vessel are allowed to attain equilibrium at 472 oC, it is found to contain 7.38 atm H2, 2.46 atm N2, and
0.166 atm NH3.
From
these data calculate the equilibrium constant, Kp, and state whether it is product or reactants favored.
N2 (g) + 3 H2 (g)
⇌
2 NH3 (g)
+
Example 4
An
aqueous solution of acetic acid is found to have the following equilibrium concentrations at 25 oC: [CH3COOH]
Unit 9: Lecture 1
The Concept of Equilibrium and the Equilibrium
Constant
+
What is equilibrium?
A
state of balance
It
can be static (like tug o war)
It
can be dynamic, like cars moving across a bridge, and like most of the reactions we will be studying
+
Chemical Equilibrium
Occurs
when opposing reactions are proceeding at equal rates
Rate
at which products form is equal to the rate at which reactants disappear
Have
the illusion that the reaction has stopped +At equilibrium, the concentrations of the reactants and products are constant, but are not necessarily equal
the reaction of iron(III) ions with thiocyanate
+Equilibrium and Rates
The
equilibrium below is two reactions:
N2O4
Forward
reaction:
Reverse
reaction: …show more content…
Which
side of the equilibrium do you think is favored in the reaction below based on the value of Kp. Justify your response.
CO (g) + Cl2 (g) ⇌ COCl2 (g)
Kp = 4.56 x 109
+
What can the equilibrium constant tell us?
A
large K indicates that there are more products than reactants at equilibrium
A
small K indicates that there are more reactants than products at equilibrium
If
If
K > 1, then it is products favored
K < 1, then it is reactants favored +
Example 3
After
mixture of hydrogen and nitrogen gases in a reaction vessel are allowed to attain equilibrium at 472 oC, it is found to contain 7.38 atm H2, 2.46 atm N2, and
0.166 atm NH3.
From
these data calculate the equilibrium constant, Kp, and state whether it is product or reactants favored.
N2 (g) + 3 H2 (g)
⇌
2 NH3 (g)
+
Example 4
An
aqueous solution of acetic acid is found to have the following equilibrium concentrations at 25 oC: [CH3COOH]