
Le Chatelier Principle
Authored by Lisa Thompson
Science
11th Grade
NGSS covered

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
For the reaction...
heat + N2(g) + O2(g) <−> 2NO(g)
If the heat is removed to the chemical system, the equilibrium will _______.
shift to the left
shift to the right
not shift
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is NOT a way to stress a closed chemical system at equilibrium?
change temperature
add a reactant
take away a chemical in the reaction
add a catalyst
Tags
NGSS.HS-PS1-5
NGSS.HS-PS1-6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If I add a chemical to a system at equilibrium, increasing its concentration,
the reaction will shift to the same side of the equation where it appears to make more of it
the reaction will shift to the opposite side of the equation where it appears to use some of it up
the reaction will not shift
byproducts (other unwanted chemicals) will be formed to use the excess
Tags
NGSS.HS-PS1-5
NGSS.HS-PS1-6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What does it mean to "shift" an equilibrium?
increase the rate of either the forward or reverse reaction
increase the rate of both the forward and reverse reactions
make new chemicals
adjust concentrations to reach a new equilibrium ratio
Tags
NGSS.HS-PS1-6
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Increasing the pressure on an equilibrium system will
shift the reaction to the side with more moles of chemicals
shift the reaction to the side with more moles of gas
shift the reaction to the side with fewer moles of gas
shift the reaction to the side with fewer moles of chemicals
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Increasing the temperature of a closed equilibrium system
will shift the reaction in the endothermic direction
will shift the reaction in the exothermic direction
will not shift the reaction
will shift the reaction to the side with heat
Tags
NGSS.HS-PS1-4
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
For the reaction...
energy + N2(g) + O2(g) <−> 2NO(g)
If O2(g) is removed, the concentration of N2 will _______.
increase
decrease
remain the same
double
Tags
NGSS.HS-PS1-5
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