Reaction Rates

Front

What factors increase the rate of a reaction?

Back

Increasing temperature, increasing concentration, increasing surface area.

Front

How does grinding a seltzer tablet into powder affect the rate of reaction?

Back

It increases the surface area, allowing for more collisions between reactant particles.

Front

What happens if you tightly coil a strip of magnesium in a reaction with hydrochloric acid?

Back

It will NOT speed up the reaction; it reduces the surface area available for reaction.

Front

What is the effect of decreasing the temperature on the energy of reactants?

Back

The energy of the reactants would decrease.

Front

Does increasing the concentration of reactants slow down the reaction?

Back

False; increasing concentration generally speeds up the reaction.

Front

Define 'reaction rate'.

Back

The speed at which reactants are converted into products in a chemical reaction.

Front

What is the role of temperature in reaction rates?

Back

Higher temperatures increase the kinetic energy of particles, leading to more frequent and effective collisions.

Front

Explain how surface area affects reaction rates.

Back

Increased surface area allows more particles to collide, increasing the rate of reaction.

Front

What is the collision theory?

Back

It states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.

Front

How does concentration affect the frequency of collisions?

Back

Higher concentration increases the number of particles in a given volume, leading to more collisions.