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WorksheetsAP Chemistry - Unit 7 - Thou Shall Not Forget
Total questions: 20
Worksheet time: 10mins
At equilibrium, rates of the forward and reverse reaction are...
The same
Not the same
A system at equilibrium
Must have reactants and products
Must have products only
Must have reactants only
At equilibrium, concentrations of reactants and products are
equal
constant
At what time does the system first reach equilibrium?
24s
40s
60s
80s
The equilibrium constant expression, Kc, given aA + bB ⇄ cC + dD, is...
Kc = [A]a[B]b[C]c[D]d
Kc = [C]c[D]d[A]a[B]b
Which substance(s) would not be included in a equilibrium constant expression?
NaCl(s)
NaCl(aq)
NaCl(l)
NaCl(g)
If a K value is greater than 1,
more products are present at equilibrium
more reactants are present at equilibrium
If a K value is VERY large,
the reaction has essentially gone to completion
there are more reactants present at equilibrium
If K < Q, the reaction will proceed in the...
reverse direction to reach equilibrium
forward direction to reach equilibrium
When a reaction at equilibrium is reversed,
the K value's sign is flipped
the K value is divided by 2
the K value is inverted
To calculate the K of an overall reaction from individual reaction K values, the individual K values are
added
subtracted
multiplied
divided
When the coefficient of a reaction is multiplied by a factor x,
the K value is multipled by x
the K value is divided by x
the K value is raised to the power x
Given the following equilibrium equation,
A (g) + 2B (g) ⇄ AB2 (g) ΔH > 0, which of the following changes will increase the amount of AB2 in the vessel?
Decreasing the temperature
Increasing the concentration of A
Removing a small amount of B
Decreasing the pressure
Given the following equilibrium equation,
A (g) + 2B (g) ⇄ AB2 (g) ΔH < 0, which of the following changes will decrease the amount of AB2 in the vessel?
Increasing the temperature
Increasing the concentration of A
Increasing the pressure
Adding a catalyst
The following system at equilibrium is exothermic. If the temperature is increased...
A (g) + 2B (g) ⇄ AB2 (g)
[A] will increase the most
[B] will increase the most
[AB2] will increase the most
For an exothermic system at equilibrium, if the temperature is increased, the equilibrium will shift towards the...
reactants
products
For an endothermic system at equilibrium, if the temperature is decreased, the equilibrium will shift towards the...
reactants
products
In a Ksp expression, we always assume that the reactant is made up of
the solid precipitate
the aqueous ions
If Ksp >1, we say the salt is...
soluble
insoluble
If a common ion is present, the solubility of a salt
is increased
is decreased
will remain the same
