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Keq
ICE
Modeling
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100

Given the following equation and concentrations, write the equilibrium expression and solve for Keq.    

H2 (g)   +   I2 (g)   ⇄   2 HI (g)

[H2] = 0.05 M, [I2] = 0.026 M, [HI] = 0.04 M


Keq = 0.0016/0.0013

Keq = 1.23

100

  1. Consider the following reaction:     

 2 XY(g)    ⇄     X2(g)    +     Y2(g)

This equilibrium has a value of Keq = ???.    If 7.0 moles of XY are injected into a 2.5 L container at 25°C , and reaches equilibrium with a concentration of 2M,  find the equilibrium Keq.  

Keq = 0.04

100

Draw a particulate that models a Keq greater than one.

Reaction --> A + B = AB

More AB than A and B.

100

Where did Mrs. Rose obtain her undergraduate degree in Neuroscience and Psychology?

Vanderbilt University

200

CO (g) + H2O (g) <--> CO2 (g)+ H2 (g)

For this reaction, the value of Keq = 0.400. At equilibrium, the following concentrations were obtained: [CO] = 4.56, [H2O] = 2.34, [CO2] = ?, [H2] = 6.9   What is the equilibrium concentration of CO2?

[CO2] = 0.619 M


200

There are 8 moles of A and 10 moles of B in a 2.0 L solution. At equilibrium [D] = 2 M. Solve for Keq. Are products or reactants favored?

2A (g) + 3B (aq) ⇄ C(l) + 2D (g)

Keq = 0.125 

Reactants Favored

200
In a Concentration vs. Time graph, when the lines intersect, what does that signify? When do you know if equilibrium has been established?

1) Intersection = equal concentration

2) Equilibrium = No longer changing concentration

200

What are the names of Mrs. Rose's 3 children?

Maya, Taylor, Evelyn

300

  1. Consider the following equation:

6 CO2 (g) + 6 H2O (g)  ⇄ C6H12O6 (s) + 6 O2 (g)

Assume the reaction is carried out in a 6.0 liter jug and sat long enough so that the reaction reached equilibrium.  The moles at equilibrium are CO2 = 0.025, H2O = 0.003, O2 = 4.0 x 10-5 

Determine the numeric value for the equilibrium constant, Keq.

Keq = 1054.71

300

In a container of 1.0 L volume, I mix 1.0 mol N2, 1.0 mol H2 and 0.5 mol O2. Write an ICE table when the equilibrium concentration of N2H4 is 0.1M.  Are reactants or products favored?

N2 (g) + 4 H2 (g) + O2 (g) <--> N2H4 (g) + 2 H2O (g)

Keq = 0.087 (REACTANTS)

300

3 H2 (g) + N2 (g) <--> 2 NH3 (g)

  1. Initially, you place 8 moles of H2 and 6 moles of N2 in a 2.0 L container. At equilibrium, the concentration of NH3 is 2 M. Find all the equilibrium concentration of all chemicals and then produce a particulate model showing what is in the container at equilibrium.

2 moles of H2, 4 moles of N2, 4 mole of NH3

300

What year was the START of Stevenson High School?

1965