WorksheetsReversible Reactions and Equilibrium
Total questions: 15
Worksheet time: 15mins
WHY is equilibrium called a dynamic state?
The rate of reaction is fast
The forward and backward reactions continue to take place once equilibrium is established.
The concentrations of the reactants and products are the same
All chemical reactions are considered to be reversible under suitable conditions.
What is the purpose of a catalyst on an equilibrium reaction?
to increase the rate of forward reaction
to increase rate of backward reaction
in increase both forward and backward reaction rates
no effect
At equilibrium, __________.
all chemical reactions have ceased
the rates of the forward and reverse reactions are equal
the rate constants of the forward and reverse reactions are equal
the value of the equilibrium constant is 1
) the limiting reagent has been consumed
Which is the reactant and why?
it's concentration is decreasing
it's concentration is increasing
it's concentration is decreasing
it's concentration is increasing
Which of the following is incorrect?
A dynamic equilibrium can be achieved...
From 100% reactants
From 100% products
In a closed system
In an open system
The forward reaction forms the substance __________.
AB
B
A + B
A
At what time is dynamic equilibrium established?
1 second
5 seconds
8 seconds
10 seconds
At what time on the graph will the reaction reach equilibrium?
t1
t2
t3
t4
For the reaction...
SO2(g) + O2(g) <−> SO3(g)
If the concentration of SO2(g) is increased, the equilibrium of the reaction will ___________.
shift to the left
shift to the right
not shift
For the reaction...
SO2(g) + O2(g) <−> SO3(g)
If the equilibrium shifts to the right, the concentration of O2(g) will ___________.
increase
decrease
remain the same
At what time (in seconds) is equilibrium established?
0 seconds
1 second
5 seconds
10 seconds
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
Which of the following statements about reversible reactions is true?
Reversible reactions only proceed in one direction.
Reversible reactions can reach a state of dynamic equilibrium.
Reversible reactions always favor the formation of products.
Reversible reactions cannot be influenced by temperature changes.
In a closed system, what happens to the concentrations of reactants and products at equilibrium?
They continue to change until all reactants are used up.
They remain constant over time.
They increase continuously.
They decrease continuously.
How does increasing the concentration of a reactant affect the position of equilibrium in a reversible reaction?
It shifts the equilibrium to the left.
It shifts the equilibrium to the right.
It has no effect on the equilibrium position.
It stops the reaction.
