Equilibrium & Le Chatelier's Principle
Authored by Erica Britton
Chemistry, Science
10th Grade - University
NGSS covered
Used 23+ times
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35 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which is the correct equilibrium constant expression for the following reaction?
Fe2O3(s) + 3H2(g) —> 2 Fe(s) + 3H2O(g)
K = [H2O]3 / [H2]3
K = [Fe2O3] [H2]3 / [Fe]2[H2O]3
K = [Fe]2[H2O]3 / [Fe2O3] [H2]3
K= [Fe] [H2O] / [Fe2O3] [H2]
K = [H2] / [H2O]
Tags
NGSS.HS-PS1-6
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The equilibrium constant expression for the reaction 2BrF5(g) —> Br2(g) + 5 F2(g) is
Kc = [Br2] [F2] / [BrF5]
Kc = [BrF5]2 / [Br2][F2]5
Kc = [Br2] [F2]5 / [BrF5]2
Kc = 2[BrF5]2 / ([Br2] × 5[F2]5)
Kc = [Br2] [F2]2 / [BrF5]5
Tags
NGSS.HS-PS1-6
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The equilibrium between carbon dioxide gas and carbonic acid is very important in biology and environmental science. CO2(g) + H2O(l) —> H2CO3(aq)
Which one of the following is the correct equilibrium constant expression (Kc) for this reaction?
Kc= 1/ [H2CO3]
Kc= [CO2]/ [H2CO3]
Kc= [H2CO3] / [CO2]
Kc= [CO2] [H2O] / [H2CO3]
Kc= [H2CO3] / [CO2] [H2O]
Tags
NGSS.HS-PS1-6
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Calculate Kc for the reaction 2 HI(g) —> H2(g) + I2(g) given that the concentrations of each species at equilibrium are as follows: [HI] = 0.85 mol/L, [I2] = 0.60 mol/L, [H2] = 0.27mol/L.
0.19
0.22
4.5
5.25
160
Tags
NGSS.HS-PS1-6
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A chemical reaction in which products can react to re-form reactants is known as a(n)
reforming reaction
reversible reaction.
buffered reaction
stoichiometric reaction.
Tags
NGSS.HS-PS1-6
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
For any reaction at chemical equilibrium, the concentrations of products and reactants
are equal.
change
remain unchanged
decrease
Tags
NGSS.HS-PS1-6
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A very high value for K indicates that
reactants are favored.
products are favored.
equilibrium is reached slowly.
equilibrium has been reached
Tags
NGSS.HS-PS1-6
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