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Le Chatelier Principles

Authored by Charles Martinez

Mathematics

12th Grade

Le Chatelier Principles
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10 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is a property of a reaction that has reached equilibrium?

The rate of the forward reaction is equal to the rate of the reverse reaction

The rate of the forward reaction if greater than the rate of the reverse reaction

The amount of products is equal to the amount of reactants

The amount of products is greater than the amount of reactants

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given the reaction at equilibrium: 2CO(g) + O2(g) <-> 2CO2(g) When the reaction is subjected to stress, a change will occur in the concentration of

neither reactants nor products

products, only

reactants, only

both reactants and products

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In which reaction will the point of equilibrium shift to the left when the pressure on the system is increased?

2Mg(s) + O2(g) <-> 2MgO(s)

2H2(g) + O2(g) <-> 2H2O(g)

C(s) + O2(g) <-> CO2(g)

CaCO3(s) <-> CaO(s) + CO2(g)

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given the reaction at equilibrium: 2 SO2(g) + O2(g) <-> 2 SO3(g) + heat. Which change will shift the equilibrium to the right?

increasing the temperature

adding a catalyst

adding more O2(g)

decreasing the pressure

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given the reaction A2(g) + B2(g) <--> 2AB(g) + heat. An increase in the concentration of A2(g) will

ncrease the production of B2(g)

decrease the production of AB(g)

increase the frequency of collisions between A2(g) and B2(g)

decrease the frequency of collisions between A2(g) and B2(g)

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given the reaction at equilibrium: N2(g) + 3 H2(g) <--> 2 NH3 (g). If the pressure is increased at constant temperature, there will be an increase in the number of moles of

both N2(g) and H2(g)

N2(g), only

NH3 (g), only

H2(g), only

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given the equilibrium reaction in a closed system: H2(g) + I2(g) + heat <--> 2 HI(g). What will be the result of an increase in temperature?

The equilibrium will shift to the left and [H2] will increase

The equilibrium will shift to the left and [H2] will decrease

The equilibrium will shift to the right and [HI] will decrease

The equilibrium will shift to the right and [HI] will increase

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