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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
A temperature increase causes the particles ......
to slow down
move faster
collide higher
in the right order
- 3. 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
- 4. Multiple Choice
The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?Red, because the activation energy is largerBlue, because the activation energy is lowerboth reaction progress at the same rate - 5. Multiple ChoiceWhat does NOT happen when the temperature is increased?Particles collide more oftenParticles collide with more energyParticles move fasterMore particles collide in the correct orientation
- 6. 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
- 7. Multiple ChoiceWhat makes an effective collision?When molecules collide.When molecules collide with the proper orientation.When molecules collide with proper orientation and enough kinetic energy.High Temperature.
- 8. Multiple ChoiceWhy don't all collisions between particles cause a reaction?the particles also need to collide with a catalystnot all the particles collide with enough energynot all the particles collide at a high enough temperaturethe particles need to collide with each other twice
- 9. 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
- 10. Multiple Choice
The minimum amount of energy needed for colliding particles to react is called
Chemical Energy
Kinetic Energy
Activation Energy
Potential Energy
- 11. Multiple ChoiceGrinding a seltzer tablet into powder increases the rate of reaction due to increasedconcentrationsurface areatemperaturereactants
- 12. Multiple Choice
Increasing pressure means that particles are ___________ together.
Happy
Never
Paired
Closer
- 13. Multiple ChoiceHydrochloric acid can react with sodium thiosulfate solution to form a sulfur precipitate. The equation is:
Na2S2O3(aq) + 2HCl(aq) → 2S(s) + SO2(g) + 2NaCl(aq) + H2O(l)
In a second experiment, an extral 50 mL of water is added to the hydrochloric acid. As a result of this change, therate of evolution of the sulfur dioxide decreasesprecipitate will form more quicklymore fruitful collision will occurreaction will not be affected because water is not a reactant - 14. Multiple ChoiceWhich of the following would increase the INITIAL reaction rate between 5.0 g aluminium and 20.0 mL of 1.00 M hydrochloric acid?Conducting the experiment in a 50 mL beaker rather than a 100 mL beaker.Using a larger volume of acid.Cleaning the surface of the metal with sandpaper.Increasing the pressure under which the experiment was conducted.
- 15. Multiple Choice
define rate of reaction?
The change in concentration of reactants or products per time unit.
The change in volume of products multiplied by the change in volume of reactants.
The change of products over the change of reactants.
How much the reactants react in a given time unit.
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