Chemical Equilibrium 13.1-13.3 Timberlake
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Chemistry
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10th - 11th Grade
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Practice Problem
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Medium
Standards-aligned
Nicole Woltschlaeger
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8 Slides • 15 Questions
1
By Nicole Woltschlaeger
2
Multiple Choice
Which of the following will increase the rate of a reaction?
removal of a catalyst
a decrease in temperature
a decrease in the concentration of reactants
addition of a catalyst
3
4
Multiple Choice
According to the collision theory, what are two of the conditions that are needed for a reaction to occur?
correct orientation and a low temperature
collision energy equal to the activation energy and the correct orientation
collision energy less than the activation energy and the correct orientation
a catalyst and a high temperature
5
Results in more collisions with adequate activation energy.
More collisions.
Decreases activation energy.
Reason
Increase Temperature
Increase reactant concentration.
Addition of a catalyst.
Factor
Timberlake 13.1
6
Multiple Choice
For every 10oC increase in temperature, most reaction rates approximately
double
triple
halve
quadruple
7
Multiple Choice
How would adding some NO change the rate of reaction?
The rate would increase.
The rate would decrease.
The rate would stay the same.
8
Multiple Choice
How would decreasing the temperature change the rate of reaction?
The rate would increase.
The rate would decrease.
The rate would stay the same.
9
Multiple Choice
How would removing some H2 change the rate of reaction?
The rate would increase.
The rate would decrease.
The rate would stay the same.
10
Multiple Choice
How would adding a catalyst change the rate of reaction?
The rate would increase.
The rate would decrease.
The rate would stay the same.
11
Fill in the Blanks
When a reaction proceeds in both a forward and reverse direction, it is said to be
Type answer...
12
Reversible Reactions
There are two reaction rates
One of the forward reaction
One of the reverse reaction
When molecules begin to react, the forward reaction is faster.
As the reaction proceeds, the forward rate decreases, and the reverse rate increases.
Timberlake 13.2
Equilibrium
13
Equilibrium
Eventually the forward and reverse rates are equal, at which point the reaction is at equilibrium.
At this point, the concentration of reactants and products remains constant
Timberlake 13.2
Equilibrium
14
Multiple Choice
Before equilibrium is reached, the concentration of reactants and products____________.
equal
not equal
change
do not change
15
Multiple Choice
Initially, reactants placed in a container have a ___________rate of reaction than the rate of reaction of the products.
equal
not equal
slower
faster
16
Multiple Choice
At equilibrium, the rate of reaction of the forward reaction is __________ to the rate of reaction of the reverse reaction.
equal
not equal
17
Multiple Choice
Which of the following are at equilibrium?
The rate of the forward reaction is twice as fast as the rate of the reverse reaction.
The concentration of the reactants and products do not change.
The rate of the reverse reaction does not change.
18
Consider the following reaction:
The equilibrium expression is defined as:
When the concentrations of the reactants and products are plugged into the expression at equilibrium, the calculated value is the equilibrium constant.
19
Multiple Choice
20
21
Multiple Choice
2 NO(g) + O2(g) ⇌ 2 NO2(g)
22
The concentrations of pure solids and pure liquids do not change, they are constant...
...thus, do not include solids and liquids in equilibrium expressions.
Some text here about the topic of discussion
23
Multiple Choice
Fe3O4(s) + 4H2(g) <=> 3Fe(s) + 4H2O(g)
Kc =
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