WorksheetsFactors That Control the Rate of a Chemical Reaction
Total questions: 23
Worksheet time: 7mins
In a chemical reaction, how quickly or slowly reactants turn
into products is called the
Catalyst
Reaction Rate
Concentration
Temperature
Increasing the ____ causes the particles (atoms
or molecules) of the reactants to move more quickly so that
they collide with each other more frequently and with more
energy.
Catalyst
Surface Area
Temperature
Concentration
_______ refers to how much solute is dissolved in
a solution.
Surface Area
Catalyst
Temperature
Concentration
________ is the measure of how much area of an
object is exposed.
Surface Area
Catalyst
Temperature
Concentration
A ______ is a substance that speeds up the rate of a
chemical reaction without being used up in the reaction itself.
Surface Area
Catalyst
Temperature
Concentration
Grains of sugar have a greater _______ than a solid cube of
sugar of the same mass, and therefore will dissolve quicker in water.
Surface Area
Catalyst
Temperature
Concentratrion
A freshly exposed surface of metallic sodium tarnishes almost instantly if exposed
to air and moisture, while iron will slowly turn to rust under the same conditions.
In these two situations, the ________ refers to how quickly or
slowly reactants turn into products.
Surface Area
Rate of Reaction
Temperature
Concentration
Adding ______ will increase the rate of reaction because
this causes the particles of the reactants to move more quickly, resulting in more
collisions and more _________.
Heat / Energy
Higher Concentrations / Explosions
Catalysts / Casualties
Reactants / Products
Pick the TWO (2) options that will INCREASE the rate of a reaction.
Reducing Heat
Adding Catalyst
Adding Heat
Removing Catalyst
Which of the following are true about how
temperature affects the rate of reaction?
heating causes the particles of the reactants
to move more quickly
lowering the temperature will raise the energy
level of the particles
increasing the temperature results in more
collisions between the particles
Increasing which of the following will
increase the frequency of collisions? (select all that apply)
Temperature
Surface Area
Concentration
Which of the following will lower the rate
of reaction?
adding an enzyme to the reaction
decreasing the temperature from 40°C to
10°C
breaking a chunk of calcium up into
smaller pieces
increasing the amount of solute
dissolved in a solution
A catalyst will
increase the activation energy of a reaction.
decrease the activation energy of a reaction.
will not affect the reaction rate.
will decrease the energy of the products
Which of the following is not true about collision theory?
reacting substances must collide
reacting substances can collide in any orientation
reactants must collide in the correct orientation
reacting substances must collide with enough energy to form an activated complex
Which is NOT an acceptable unit for expressing a reaction rate?
M/min
L/s
mol/(mL h)
mol/(L min)
The change in concentration of a reactant or product per unit of time is the
reaction rate
activation rate
collision theory
rate law
What quantity does the letter B represent in the above diagram?
activated complex
reactant energy
activation energy
product energy
The concentration of reactant A decreases from 0.400 mol/L at 0.00 min. to 0.384 mol/L at 4.00 min. Calculate the average reaction rate during this time period.
0.004 mol/L min.
-0.004 mol/L min.
0.154 mol/L min.
The diagram above represents a(n)
exothermic reaction
endothermic reaction
catalytic reaction
The equilibrium constant is the ratio of the _____________ concentration to the ___________ concentration.
reactant, product
product, reactant
catalyst, product
catalyst, reactant
A reaction with a chemical equilibrium constant greater than 1 indicates that
the products are favored at equilibrium
the reactants are favored at equilibrium
the equilibrium constant will never be greater than 1 because no reaction is 100% complete
For a reaction mixture to reach a state of chemical equilibrium it must (select all that apply)
must be a closed container
must be at room temperature
it must be at constant temperature
all reactants and products must be present
The reaction in the diagram represents what type of reaction?
endotherimic
exothermic
combustion
complete
