Reaction Rates

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

• concentration
• surface area
• temperature
• reactants

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

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

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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

Products will form faster if____________

• the particle size of the reactants are larger.
• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

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NGSS.HS-PS1-5

NGSS.HS-PS1-6

In a chemical reaction, how quickly or slowly reactants turn

into products is called the

• Catalyst

• Reaction Rate

• Concentration

• Temperature

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NGSS.HS-PS1-5

More collisions correspond to a:

• Faster reaction rate

• Slower reaction rate

• Constant reaction rate

Tags

NGSS.HS-PS1-5

The rate of a chemical reaction is NOT affected by which of the following:

• temperature
• concentration
• particle size (surface area)
• All of these affect reaction rates

Tags

NGSS.HS-PS1-5

Increasing the ____ causes the particles (atoms

or molecules) of the reactants to move more quickly so that

they collide with each other more frequently and with more

energy.

• Catalyst

• Surface Area

• Temperature

• Concentration

Tags

NGSS.HS-PS1-5

Grains of sugar have a greater _______ than a solid cube of

sugar of the same mass, and therefore will dissolve quicker in water.

• Surface Area

• Catalyst

• Temperature

• Concentratrion