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WorksheetsCh. 18 (Chemical Equilibrium)
Total questions: 20
Worksheet time: 5hrs 0mins
CO(g) + H2O(g) ⇌ CO2(g) + H2(g)
This is the expression for the equilibrium constant for the reaction shown above.
The hydrogen sulfide produced as a byproduct of petroleum refinement can be used to produce elemental sulfur:
2H2S(g) + SO2(g) ⇌ 3S(l) + 2H2O(g)
What is the equilibrium constant expression for this reaction?
What can be determined if the ion product (Qsp) is compared to the solubility product constant (Ksp) ?
equilibrium
whether a substance will precipitate
the law of mass action
the volume of the solution
The value of any equilibrium constant is correct only at
a specific volume.
a specific pressure.
a specific concentration.
a specific temperature.
A system reaches chemical equilibrium when
no new product is formed by the forward reaction.
the reverse reaction no longer occurs in the system.
the concentration of reactants in the system is equal to the concentration of products.
the rate at which the forward reaction occurs equals the rate of the reverse reaction.
What does a value of Keq greater than 1 mean?
more reactants than products exist at equilibrium
more products than reactants exist at equilibrium
the rate of the forward reaction is high at equilibrium
the rate of the reverse reaction is high at equilibrium
What might cause the solubility of a substance to decrease?
a decrease in temperature
a decrease in pressure
the presence of a common ion
all the choices are correct.
Use the following reaction to answer the following questions.
Reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)
Which way will the equilibrium shift when the concentration of NH3 is increased?
The equilibrium shifts to the left.
The equilibrium shifts to the right.
The equilibrium does not change.
The equilibrium constant changes.
Use the following reaction to answer the following questions.
Reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)
What will be the result if the volume of the reaction vessel is decreased (aka increase in pressure) for the reaction above?
The equilibrium shifts to the left.
The equilibrium shifts to the right.
The equilibrium does not change.
The equilibrium constant changes.
Use the following reaction to answer the following questions.
Reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)
Which way will the equilibrium shift when the concentration of H2 is decreased?
The equilibrium shifts to the left.
The equilibrium shifts to the right.
The equilibrium does not change.
The equilibrium constant changes.
Use the following reaction to answer the following questions.
Reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)
Which way will the equilibrium shift when a catalyst is introduced to the equilibrium equation?
The equilibrium shifts to the left.
The equilibrium shifts to the right.
The equilibrium does not change.
The equilibrium constant changes.
Equilibrium reaction in which the reactants and products are present in more than one physical state is called what?
common ion
solubility product constant
heterogeneous equilibrium)
Le Châtelier’s principle
chemical equilibrium
A state in which the forward and reverse reactions balance each other because they take place at equal rates is called what?
common ion
solubility product constant
heterogeneous equilibrium)
Le Châtelier’s principle
chemical equilibrium
An equilibrium constant for the dissolving of a sparingly soluble ionic compound in water is called what?
common ion
solubility product constant
heterogeneous equilibrium)
Le Châtelier’s principle
chemical equilibrium
An ion that is part of two or more ionic compounds in solution is called what?
common ion
solubility product constant
heterogeneous equilibrium)
Le Châtelier’s principle
chemical equilibrium
If a stress is applied to a system at equilibrium, the system shifts in the direction that relieves the stress. This statement is called what?
common ion
solubility product constant
heterogeneous equilibrium)
Le Châtelier’s principle
chemical equilibrium
The numerical value of the ratio of product concentrations to reactant concentrations, with the concentration of each reactant and product raised to the power corresponding to its coefficient in the balanced equation is called what?
reversible reaction
law of chemical equilibrium
equilibrium constant
homogeneous equilibrium
A reaction that can occur in both the forward and the reverse directions is called what?
reversible reaction
law of chemical equilibrium
equilibrium constant
homogeneous equilibrium
Equilibrium reaction in which all the reactants and products are in the same physical state is called what?
reversible reaction
law of chemical equilibrium
equilibrium constant
homogeneous equilibrium
At a given temperature, a chemical system may reach a state in which a particular ratio of reactant and product concentrations has a constant value. This is called what?
reversible reaction
law of chemical equilibrium
equilibrium constant
homogeneous equilibrium
