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Worksheets18.1.1 P Rates and Factors
Total questions: 66
Worksheet time: 1hrs 11mins
The ____________ states that atoms, ions, or molecules must collide in order to react.
transition state
activation energy
rate law
collision theory
Which of the following increase the reaction rate?
less surface area
lower temperature
increasing pressure
increased concentration
If the temperature is reduced, a reaction rate will ______
increase
decrease
stay the same
If the concentration of a reactant is increased, the reaction rate will ___________.
increase
decrease
stay the same
The ____________ states that atoms, ions, or molecules must collide in order to react.
transition state
activation energy
rate law
collision theory
Which of the following CAN affect reaction rates? Check all that apply?
temperature
concentration
surface area
catalysts
How will a rate of reaction be altered if temperature is increased?
reaction rate decreases (goes slower)
reaction rate increases (goes faster)
reaction rate is constant (stays the same)
Which of the following CAN affect reaction rates? Check all that apply?
temperature
concentration
surface area
catalysts
How will a rate of reaction be altered if temperature is increased?
reaction rate decreases (goes slower)
reaction rate increases (goes faster)
reaction rate is constant (stays the same)
Products will form faster if which of the following occurs? Select all that apply.
surface area is increased
temperature is decreased
reactant concentration is increased
the reactant solution is not stirred
Which of the following increases a reaction rate without being used up?
catalyst
product
reactant
How does a catalyst affect a reaction rate?
it makes the reaction faster by lowering the activation energy and energy needed to form the activated complex
it makes the reaction faster by raising the activation energy and energy needed to form the activated complex
it makes the reaction slower by lowering the activation energy and energy needed to form the activated complex
it makes the reaction slower by raising the activation energy and energy needed to form the activated complex
When a sugar cube is crushed up, the particles get smaller. How has the surface area of the particles changed?
the surface area increases
the surface area decreases
the surface area remains constant
When surface area increases, the reaction rate does which of the following?
goes faster (rate increases)
goes slower (rate decreases)
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the frequency of the collisions among particles.
false
true
If solution A is put into an ice water bath before being combined with solution B, how would the reaction rate be altered?
it would be faster (rate increases)
it would be slower (rate decreases)
How does increasing the concentration affect a reaction rate?
makes it go faster (increases rate)
makes it go slower (decreases rate)
Which of the following will increase the reaction rate (make it go faster) on an all gas system?
decreasing the surface area of a reactant
lowering the temperature of a reactant
increasing pressure of the container
increasing reactant concentration
Which of the following best describes how a catalyst works?
lowers the pressure
raises the temperature
lowers the activation energy
raises the activated complex
Which of the following best describes the Collision Theory?
reactants must collide, collide with proper orientation, and enough activation energy
products must collide, collide with proper orientation, and enough activation energy
the activated complex must collide, collide with proper orientation, and enough activation energy
reactants and products together must collide, collide with proper orientation, and enough activation energy
A reaction between which of the following would increase the rate of a reaction and make it occur the fastest? What variable is being manipulated?
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C
10 g of aluminum strip and 0.5 M hydrochloric acid at 60°C
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; concentration is being altered
10 g of aluminum strip and 0.5 M hydrochloric acid at 60°C; concentration is being altered
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; temperature is being altered
10 g of aluminum strip and 0.5 M hydrochloric acid at 60°C; temperature is being altered
A reaction between which of the following would increase the rate of a reaction and make it occur the fastest? What variable is being manipulated?
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C
10 g of aluminum strip and 1 M hydrochloric acid at 20°C
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; concentration is being altered
10 g of aluminum strip and 1 M hydrochloric acid at 20°C; concentration is being altered
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; temperature is being altered
10 g of aluminum strip and 1 M hydrochloric acid at 20°C; temperature is being altered
A reaction between which of the following would increase the rate of a reaction and make it occur the fastest? What variable is being manipulated?
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C
10 g of granular aluminum and 0.5 M hydrochloric acid at 20°C
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; concentration is being altered
10 g of granular aluminum and 0.5 M hydrochloric acid at 20°C; concentration is being altered
10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; surface area is being altered
10 g of granular aluminum and 0.5 M hydrochloric acid at 20°C; surface area is being altered
You have 1 M HCl reacting with 5 g of granular magnesium at room temperature. If you add water to the 1 M HCl, how will this alter the reaction rate?
it will make the reaction faster because you are increasing the concentration
it will make the reaction slower because you are increasing the concentration
it will make the reaction faster because you are decreasing the concentration
it will make the reaction slower because you are decreasing the concentration
You have a solution of 0.1 M silver nitrate reacting with a 5 g chunk of salt at room temperature. If you crush/pulverize the salt chunk, how will this alter the reaction rate?
it will make the reaction faster because you are increasing the surface area of the salt
it will make the reaction slower because you are increasing the surface area of the salt
it will make the reaction faster because you are decreasing the surface area of the salt
it will make the reaction slower because you are decreasing the surface area of the salt
You have a 0.2 M aqueous solution of copper (II) sulfate reacting with powdered iron at room temperature. If you put the solution of copper (II) sulfate in an ice water bath, how will this alter the reaction rate when combined with the iron?
it will make the reaction faster because you are increasing the temperature of the solution
it will make the reaction slower because you are increasing the temperature of the solution
it will make the reaction faster because decreasing the temperature of the solution
it will make the reaction slower because you are decreasing the temperature of the solution
What is the minimum amount of energy needed for colliding particles to react?
Chemical Energy
Kinetic Energy
Activation Energy
Potential Energy
A catalyst can be "recycled" and used again and again and again...
False
True
The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?
Purple, because the activation energy is larger
Green, because the activation energy is lower
both reaction progress at the same rate
How can you increase the surface area of a solid?
crush/pulverize the solid into smaller pieces
add a larger mass of the solid particles
melt the solid into a liquid
increase the temperature
How does increasing concentration increase the rate of a reaction?
fewer collisions occur among reactants
more kinetic energy is provided to the reactants
more collisions occur among reactants
less kinetic energy is provided to the reactants
Examine the model between the two reactants. Which variable is being changed and how does it alter the reaction rate?
concentration is increasing and will increase the reaction rate (it goes faster)
concentration is decreasing and will decrease the reaction rate (it goes slower)
surface area is increasing and will increase the reaction rate (it goes faster)
surface area is decreasing and will decrease the reaction rate (it goes slower)
Examine the model between the two reactants which are red and blue. Which variable is being changed and how does it alter the reaction rate?
concentration is increasing and will increase the reaction rate (it goes faster)
concentration is decreasing and will decrease the reaction rate (it goes slower)
surface area is increasing and will increase the reaction rate (it goes faster)
surface area is decreasing and will decrease the reaction rate (it goes slower)
Examine the model between the two reactants which are red and blue. Which variable is being changed and how does it alter the reaction rate?
temperature is increasing and will increase the reaction rate (it goes faster)
temperature is decreasing and will decrease the reaction rate (it goes slower)
surface area is increasing and will increase the reaction rate (it goes faster)
surface area is decreasing and will decrease the reaction rate (it goes slower)
concentration is decreasing and will decrease the reaction rate (it goes slower)
What is the rate of a reaction?
How fast something happens
How slow something happens
When two chemicals mix together and make something new
change in concentration per unit time of any one reactant or product
What is the instantaneous rate of reaction
Is the reaction time instantly
Is the rate of reaction at any one particular time during the reaction
Is the rate of reaction at multiple times during the reaction
Is the rate of reaction initially during the reaction
2 factors affecting the rate of a reaction are
Particle size
Time
Temperature
Solubility
Particle size affects rate of reaction how
Large the particle size, the quicker the reaction due to a large surface area
Dust particles have a very slow reaction
Smaller the particle size, the quicker the reaction due to a large surface area
Cutting potatoes up into smaller pieces doesn't help it cook faster
This image indicates what about concentration?
Decreasing concentration, decreases the rate of a reaction
Having equal amounts of both increases rate of reaction
Increasing concentration, increases the rate of a reaction
Increasing concentration, decreases the rate of a reaction
This image tells you what about higher temperature in terms of rate of reaction
Increase temperature, increase collisions as the particles have less energy and so collide more
Increase temperature, decrease collisions
Increase temperature, increase collisions as the particles have more energy and so collide more
Decrease temperature which increases collisions so the rate of reaction increases
What is a catalyst according to chemistry
A substance that speeds up the rate of a reaction without being used up in the reaction
A substance that slows down the rate of a reaction without being used up in the reaction
A substance that alters the rate of a reaction without being used up in the reaction
A substance that slows down the rate of a reaction and is used up in the reaction
Reactants have more energy than products in which type of reaction
Endothermic
Exothermic
