Reaction Rates Flashcard

Front

What is activation energy?

Back

The minimum amount of energy needed for a reaction to potentially occur.

Front

Which of the following will NOT speed up the rate of reaction between magnesium and hydrochloric acid?

Back

Tightly coiling up the strip of magnesium.

Front

What can prevent a chemical reaction from occurring?

Back

Insufficient activation energy.

Front

What determines the rate at which a reaction occurs?

Back

The frequency of effective collisions.

Front

Increasing the number of collisions between reactants causes the rate to...

Back

Increases. This happens by increasing the concentration or by increasing the temperature.

Front

What is the effect of temperature on reaction rates?

Back

Increasing temperature generally increases reaction rates by providing more energy to the reactants.

Front

How does concentration affect reaction rates?

Back

Higher concentration of reactants leads to more frequent collisions, thus increasing the reaction rate.

Front

What role do catalysts play in chemical reactions?

Back

Catalysts lower the activation energy required for a reaction, increasing the rate without being consumed.

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products through breaking and forming of bonds.

Front

Define 'effective collision' in the context of chemical reactions.

Back

An effective collision is a collision between reactant particles that results in a chemical reaction.