Reaction Rates Review

Increase in temperature of the reactants can do one of the following

• Slow collision frequency

• Allow less effective collision between the particles

• Cause particles to lose speed

• Increase collision between the particles thus increasing the rate.

Tags

NGSS.HS-PS1-5

Which factors increase the rate of a reaction.

• increasing temperature

• increasing concentration

• increasing surface area

• all of these

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NGSS.HS-PS1-5

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst

• product

• reactant

• solute

Tags

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

What effect does increasing the concentration of reactants have on the rate of reaction?

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

• It increases the rate of reaction.

• It stops the reaction.

Tags

NGSS.HS-PS1-5

which factor that affect reaction rate is represented?

• Temperature

• Catalyst

• Surface Area

• Concentration

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NGSS.HS-PS1-5

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 because there are more collision sites

Tags

NGSS.HS-PS1-5

Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?

• roll the magnesium strip into a small ball

• Grind up the strip of magnesium

• increase the concentration of the hydrocholoric acid

• increase the temperature of the hydrocholoric acid

Tags

NGSS.HS-PS1-5

When we investigate the rate of reaction we are looking at the...

• 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