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Chemistry, Science, Biology
9th
grade
Factors Affecting Reaction Rate
8 questions
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- 1. Multiple Choice
What are the two necessary conditions in order for a chemical reaction to occur? (You may select more than 1 answer)
Reactants must have a higher potential energy than products
Particles must collide in the correct orientation.
Particles must collide in the presence of a catalyst.
Particles must have sufficient energy to overcome the activation energy.
- 2. Multiple Choice
What do you call the minimum amount of energy required for a chemical reaction to occur?
Potential energy
Kinetic energy
Activation energy
Chemical energy
- 3. Multiple Choice
Which of the following would slow down a reaction?
Putting it in an ice bath
Putting it in a hot bath
Increasing the pressure
Increasing the concentration
- 4. Multiple Choice
5.0 g of catalyst was added to speed up the reaction. How much catalyst was left at the end of the reaction?
more than 5.0 g
exactly 5.0 g
less than 5.0 g
cannot be determined
- 5. Multiple Choice
True or False: Between two solids of the same mass, the solid that is larger in size will influence an increase in the rate of a reaction.
True
False
- 6. Multiple Choice
How could we increase the rate of this reaction?
Decrease the concentration of the acid
Crush the chalk to increase surface area
Put the test tube in an ice bath
Add another piece of chalk
- 7. Multiple Choice
Why does coating with paint slow down the rusting of iron?
The paint is an "anti-catalyst", causing opposite reaction to occur
The paint cools down iron to slow down the reaction.
The paint stops O2 from reacting with iron, decreasing the concentration of O2
The paint decreases the surface area of iron, slowing down the rusting
- 8. Multiple Choice
What concentration of HCl acid would react the fastest with magnesium?
1.0
0.1
0.01
0.2
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