LT6.1 Reaction Rates

Front

What is a catalyst?

Back

A catalyst is a substance that increases the rate of a reaction without being used up during the reaction.

Front

How does surface area affect reaction rates?

Back

Greater surface area allows for more collisions between reactant particles, increasing the reaction rate.

Front

What happens to the reaction rate when the concentration of reactants is increased?

Back

Increasing the concentration of reactants leads to more frequent collisions, resulting in a faster reaction rate.

Front

How does temperature influence reaction rates?

Back

Increasing the temperature causes particles to move more quickly, leading to more frequent and energetic collisions.

Front

What is the relationship between volume and reaction rate?

Back

In a fixed number of particles, a smaller volume increases the concentration, leading to a higher reaction rate due to more collisions.

Front

Define reaction rate.

Back

Reaction rate is the speed at which reactants are converted into products in a chemical reaction.

Front

What role do collisions play in chemical reactions?

Back

Collisions between reactant particles are necessary for reactions to occur; more collisions generally lead to a faster reaction.

Front

What is the effect of particle size on reaction rates?

Back

Smaller particle size increases the surface area, leading to more collisions and a faster reaction rate.

Front

Explain the term 'activation energy.'

Back

Activation energy is the minimum energy required for a chemical reaction to occur.

Front

What is the effect of stirring on reaction rates?

Back

Stirring increases the movement of particles, leading to more collisions and a faster reaction rate.