Lab: Reaction Rate — Unit test Answers
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The equation below shows a reaction that produces calcium carbonate.Ca(OH)2(s) + CO2(g) CaCO3(s) + H2O(l)Which describes a way to speed up the collisions between calcium hydroxide and carbon dioxide molecules to produce calcium carbonate faster?
A
Lower the temperature.B
Use larger pieces of calcium hydroxide.C
Lower the pressure.D
Reduce the volume of the container.2
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Which is true about reaction rates?
A
High reaction rates occur only in spontaneous reactions.B
Low reaction rates occur only in nonspontaneous reactions.C
Reaction rates are not dependent on high or low activation energies.D
Reaction rates are not related to spontaneity.3
Which statement is usually true about the relationship between activation energy and reaction rates?
A
Low activation energy barriers result in low rates.B
High activation energy barriers result in low rates.C
Low activation energy barriers result in no reaction.D
High activation energy barriers result in no reaction.4
How does an increase in reactant concentration affect the rate of reaction?
A
It leads to more frequent collisions, which increase reaction rate.B
It leads to less frequent collisions, which increase reaction rate.C
It leads to more frequent collisions, which decrease reaction rate.D
It leads to less frequent collisions, which decrease reaction rate.Did you find these answers helpful?
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