Factors Affecting Reaction Rates

Which of the following CAN affect reaction rates? Check all that apply?

• temperature

• concentration

• surface area

• catalysts

• pressure

Tags

NGSS.HS-PS1-5

How will a rate of reaction be altered if temperature is increased?

• reaction rate decreases (goes slower)

• reaction rate increases (goes faster)

• reaction rate is constant (stays the same)

Tags

NGSS.HS-PS1-5

Products will form faster if which of the following occurs? Select all that apply.

• surface area is increased

• temperature is decreased

• reactant concentration is increased

• the reactant solution is not stirred

Tags

NGSS.HS-PS1-5

Which of the following increases a reaction rate without being used up so that it can be recycled over and over?

• catalyst

• product

• reactant

How does a catalyst affect a reaction rate?

• it makes the reaction faster by lowering the activation energy and energy needed to form the activated complex

• it makes the reaction faster by raising the activation energy and energy needed to form the activated complex

• it makes the reaction slower by lowering the activation energy and energy needed to form the activated complex

• it makes the reaction slower by raising the activation energy and energy needed to form the activated complex

Tags

NGSS.HS-PS1-5

When a sugar cube is crushed up, the particles get smaller. How has the surface area of the particles changed?

• the surface area increases

• the surface area decreases

• the surface area remains constant

When surface area increases, the reaction rate does which of the following?

• goes faster (rate increases)

• goes slower (rate decreases)

Tags

NGSS.HS-PS1-5

Increasing the temperature will increase the kinetic energy of particles, therefore increasing the frequency of the collisions among particles.

• false

• true

Tags

NGSS.HS-PS1-5

If solution A is put into an ice water bath before being combined with solution B, how would the reaction rate be altered?

• it would be faster (rate increases)

• it would be slower (rate decreases)

Tags

NGSS.HS-PS1-5

How does increasing the concentration affect a reaction rate?

• makes it go faster (increases rate)

• makes it go slower (decreases rate)

Tags

NGSS.HS-PS1-5