Keq
What side of the equilibrium is favored when Keq >1?
Products!
How do you know if the change row is -x, -2x or -3x?
Look at the coefficient of that chemical in the balanced equation.
When you analyze a concentration vs time graph, how do to determine the time that equilibrium has been reached?
The lines are all parallel to one another.
What other course does Dr. Zimlich teach?
AP Chemistry
What does it mean to say that one side of an equilibrium is favored?
It means that there is a higher concentration of those chemicals.
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
When analyzing a particulate model for the following equilibrium: A + B <=> AB, the model shows 10 A, 10 B and 5 AB at equilibrium. Does this model favor the products or reactants?
reactants! there are more reactants than products at EQ.
What is my birthday month?
July!
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
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
Draw a particulate that models a Keq greater than one.
Reaction --> A + B = AB
More AB particles than A and B particles.
What year was the START of Stevenson High School?
1965
CO + H2O <--> CO2 + H2
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
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)
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
What subject is my doctorate degree in?
Educational Psychology
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
H2(g)+I2(g)⇌2HI(g)
At a certain temperature, the equilibrium constant Keq is 49.0.
Initially, a container holds 1.00 M H₂ and 1.00 M I₂. What are the concentrations at equilibrium?
[H2]=[I2]=1.00−x=0.222M
[HI] = 2x = 1.556,
3 H2 (g) + N2 (g) <--> 2 NH3 (g)
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
How many kids do I have?
2