Factors Influencing Reaction Rates: Chem Reg

Front

What is the BEST description of 'reaction rate'?

Back

amount of product formed per unit of time

Front

Which factors increase the rate of a reaction?

Back

Increasing temperature, increasing concentration, increasing surface area

Front

How does an increase in temperature affect the particles in a chemical reaction?

Back

Increases kinetic energy of particles so more collisions occur, so more successful collisions are likely.

Front

How does a catalyst increase the rate of reaction?

Back

It reduces the activation energy of the reaction.

Front

What increases the rate of reaction by lowering the activation energy?

Back

catalyst

Front

What is the main idea of collision theory?

Back

particles must collide in order to react

Front

Why aren't all collisions between particles 'successful' / cause a reaction?

Back

Not all the particles collide with enough energy and/or in the correct orientation.

Front

Why does a higher temperature increase the rate of a reaction?

Back

it increases both the frequency and energy of particle collisions

Front

Which action decreases the rate of a reaction?

Back

place the reactants (in test tube) in a ice bath (cup of ice)

Front

Consider the photo: which of these actions would cause the rate of reaction to increase? Options: decrease the concentration of the acid in the test tube, crush up the piece of chalk into a fine powder and/or small chunks, place a stopper over the test tube to collect the gas produced, place the test tube in an ice bath after first bubble forms.

Back

crush up the piece of chalk into a fine powder and/or small chunks