Reaction Kinetics

Which of the following factors increases only the effectiveness of collisions?

• temperature

• catalysts

• concentration

• particle size

Under the collision theory, the particles must collide with  ____ and ____ for a reaction to occur.

• sufficient rate and sufficient energy

• sufficient surface area and correct orientation

• sufficient catalyst and sufficient energy

• sufficent energy and correct orientation

If the temperature is reduced, a reaction rate will ______

• increase

• decrease

• stay the same

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

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

Which is an appropriate unit for the rate of a reaction?

• mol dm^-3 s

• mol dm^-3 s^-1

• mol dm^-3

• s

Tags

NGSS.HS-PS1-5

The rate constant in the rate law above is 0.5 L/mol·s. If the initial concentration of A is 0.1 M, how long will it take for [A] to drop to 0.025 M?

• 0.7 s

• 1.4 s

• 2.8 s

• There is not enough information given.

Tags

NGSS.HS-PS1-5

Which factors affect the rate of a reaction?

• polarity

• temperature

• presence of a catalyst

• concentration

• physical state

Tags

NGSS.HS-PS1-5

If the rate quadruples when [A] doubles, the rate depends on __ and the reaction is __

Tags

NGSS.HS-PS1-5

In the rate law equation, k represents the ____________.

• kelvin

• kinetic constant

• rate constant

• reaction order

Tags

NGSS.HS-PS1-5