Rate of Reaction

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

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NGSS.HS-PS1-5

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

Tags

NGSS.HS-PS1-5

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration

• surface area

• temperature

• reactants

The rate of a reaction is how _____________ a reaction occurs.

• Quickly

• Easily

• Unusually

• Differently

Tags

NGSS.HS-PS1-5

Rate of chemical reaction means

• amount of product formed

• speed of reaction

• concentration of reacting particles

• combining reactants with products

Tags

NGSS.HS-PS1-5

How could we make this reaction happen more quickly?

• Decrease the concentration of the acid

• crush the chalk to increase the surface area

• Put the test tube in an ice bath

Tags

NGSS.HS-PS1-5

More collisions correspond to a: 

• Faster reaction rate  

• Slower reaction rate

• Constant reaction rate 

• None of the above

Tags

NGSS.HS-PS1-5

To slow down a chemical reaction you will do one of the following:

• Place the reactants in hot water

• Place the products in ice bath

• Place the reactants in a ice bath

• Keep stirring the reactants with a stirring rod

Tags

NGSS.HS-PS1-5

Why does a higher temperature increase the rate of a reaction?

• It increases both the frequency collision and energy of reactant particles

• It only increases the frequency of collision

• It only increases the energy of reactant particles

• It reduces the activation energy of the reaction

Tags

NGSS.HS-PS1-5

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

• concentration

• total surface area

• temperature

• size

Tags

NGSS.HS-PS1-5