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- 1. Multiple Choice
List four factors that affects the rate of a reaction
temperature
concentration
surface area
volume
catalysts
- 2. Multiple Choice
How does a catalyst work in speeding up a reaction?
By lowering the activation energy or reaction
by giving them more energy
by making them more available
- 3. Multiple Choice
Why does a higher concentration increase the rate of reaction?
it increases the amount of reactants
it lowers the activation energy
it increases the energy of particle collisions
it increases the frequency of particle collisions
- 4. Multiple Choice
Why does a higher temperature increase the rate of a reaction?
it increases both the frequency and energy of particle collisions
it only increases the frequency of particle collisions
it only increases the energy of particle collisions
it reduces the activation energy of the reaction
- 5. Multiple Choice
what factors can affect the value of the activation energy of a reaction?
The presence of a catalyst
changes in temperature
changes in concentration of the reactants
changes in pressure
- 6. Multiple ChoiceCatalysts are thought to increase the rate of a chemical reaction bysupplying the energy needed to overcome the activation energyincreasing the temperature of the reactionproviding less surface area for the reactionproviding an alternative reaction pathway with a lower activation energy
- 7. Multiple ChoiceIncreasing the temperature of a chemical reactionlowers the activation energy of the reactionincreases the energy of the reactant particles onlyincreases the value of ΔH for the reactionincreases the energy of the reactant and product particles
- 8. Multiple ChoiceWhat is the rate of reaction?How fast a reaction isHow big a reaction isHow loud a reaction isHow much gas a reaction produces
- 9. Multiple Choice
Grinding a effervescent tablet into powder increases the rate of reaction due to increased
concentration
surface area
temperature
reactants
- 10. Multiple Choice
The ______________is required to break the bonds of the reactants.
Carbonic energy
Activation energy
Plutonic energy
Energi Gaib
- 11. Multiple ChoiceA catalyst increases the efficiency of collisions between reactants.truefalse
- 12. Multiple ChoiceYou observe bubbles after adding metal to a solution. Do you assume a chemical reaction took place?YesNo
- 13. Multiple ChoiceA solution is heated and bubbles form. Do you assume a chemical reaction took place?YesNo
- 14. Multiple ChoiceTwo clear and colorless solutions are combined within a test tube. The result is very cloudy. Do you assume a chemical reaction took place?YesNo
- 15. Multiple ChoiceTwo clear and colorless solutions are combined within a test tube. The resulting solution is purple. Do you assume a chemical reaction took place?YesNo
- 16. Multiple ChoiceMetal is added to a solution in a test tube. The test tube now feels cooler. Do you assume a chemical reaction took place?YesNo
- 17. Multiple ChoiceMetal is added to a solution in a test tube. The test tube now feels cooler. Do you assume a chemical reaction took place?YesNo
- 18. Multiple ChoiceA beaker containing a solution is heated. The beaker now feels warm. Do you assume a chemical reaction took place?YesNo
- 19. Multiple ChoiceIncreasing the concentration of the reactants will slow down the reaction.falsetrue
- 20. Multiple ChoiceUsually lowering the temperature will slow down a reaction.falsetrue
- 21. Multiple ChoiceIncreasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.falsetrue
- 22. Multiple ChoiceThe ___________ the surface area of the reactants, the faster the reaction rate.largersmaller
- 23. Multiple ChoiceSmaller particle size allows for a _________ surface area to be exposed for the reaction.largersmaller
- 24. Multiple ChoiceA ______________ is a substance that increases the rate of a reaction without being used up during the reaction.catalystproductreactantsolute
- 25. Multiple ChoiceProducts will form faster if____________the particle size of the reactants are larger.temperature is decreased.concentration of the reactants are increased.the reaction is not stirred.
- 26. Multiple ChoiceThe rate of a reaction increases as temperature__________________.DecreasesIncreasesStays the Same
- 27. Multiple ChoiceThe rate of a chemical reaction is NOT affected by which of the following:temperatureconcentrationparticle size (surface area)All of these affect reaction rates
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