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- 1. Multiple ChoiceWhich of the following is NOT a factor affecting reaction rate?temperaturecatalystsparticle sizepolarity
- 2. Multiple ChoiceReaction rate means...amount of product formedspeed of reactionconcentration of reacting particlescombining reactants with products
- 3. Multiple ChoiceDecreasing the particle size increases the reaction rate becauseIt makes particles move fasterIt increases the likelihood of collisions with the correct geometryIt decreases the surface area available to reactIt increases the number of collisions
- 4. Multiple ChoiceTo slow down a chemical reaction you will do one of the following:Place the reactants in hot waterPlace the products in ice bathPlace the reactants in a ice bathKeep stirring the reactants with a stirring rod
- 5. Multiple ChoiceA possible rate law for a third overall order of a reaction is __________________Rate = k [A]2[B]2Rate = k [A][B]3Rate = k [A]3 [B]Rate = k [A]2[B]
- 6. Multiple Choice
The following data were measured for the reaction
BF3(g) + NH3(g) ⟶ F3BNH3(g)
What is the rate law for the reaction?
rate = k[NH3]
rate = k[BF3]2[NH3]
rate = k[BF3][NH3]
rate = k[BF3][NH3]2
- 7. Multiple Choice
Given the following rate law,
rate = k[A]2[B]
if [A] were doubled, what must happen to [B] to keep the rate constant?
[B] must quadruple
[B] must double
[B] must be havled
[B] must be quartered
- 8. Multiple Choice
The catalyst alters the rate of a chemical reaction by,
providing an alternative pathway with a lower Ea
changing the products formed in the direction of the reaction
providing a surface on which the molecules react
increasing the frequencies of collisions between molecules
- 9. Multiple Choice
Which of the following are true of reaction rates?
I. The overall rate law is determined by the fastest step of a reaction
II. The presence of a catalyst will increase the number of molecules entering the transition state
III. An increase in temperature will increase the rate of a reaction
IV. Increasing the concentration of reactants will increase the rate at which products yield
II+III+IV
I+IV
II + III
I+II+III
- 10. Multiple Choice
The iodide ion reacts with hypochlorite ion in the following way:
OCl- + I- ⟶ OI- + Cl-.
This rapid reaction gives the rate data shown. What is the rate law?
rate = [OCl-]2[I-]
rate = [OCl-][I-]2
rate = [OCl-][I-]
rate = [OCl-]
- 11. Multiple Choice
Units of rate is _______-
M/s
mol/s
m.s
s/M
- Answer choicesTagsAnswer choicesTags