Rates of Chemical Reactions

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 breaking up a solid reactant increase the rate of reaction?

• it creates more solid

• it creates more energy

• it increases the surface area

• it increases the concentration

Breaking up a lump of potassium into smaller pieces increases the rate of reaction due to increased

• concentration

• surface area

• temperature

• reactants

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

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

Tags

NGSS.HS-PS1-5

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

• concentration

• surface area

• temperature

• reactants

The speed at which a chemical reaction occurs

• Fast

• Slow

• Rate

• Ratio

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

The rate of a reaction increases as temperature__________________.

• Decreases

• Increases

• Stays the Same

Tags

NGSS.HS-PS1-5

The ___________ the surface area of the reactants, the faster the reaction rate.

• larger 

• smaller