Chemistry exam flashcards

What is the rate of reaction?

The rate of reaction is how quickly a reaction proceeds.

What happens as a reaction proceeds?

As a reaction proceeds, the amount of reactant will decrease, and the amount of product will be increased.

What determines the rate of reaction?

The amount of time this takes determines the rate of reaction.

What is sometimes necessary to do with reactions?

Sometimes it is necessary to slow reactions down, for example the corrosion of metals and decay of food.

What are four things the rate of reaction can be increased by?

• Increasing the temperature

• increasing the surface area of solid reactants

• increasing the concentration of the reactants

• adding a catalyst

How does increasing the temperature affect the reaction rate?

Raising the temperature causes the reactant particles to move more quickly. This means they have more energy (specifically kinetic energy). Particles that are moving more quickly, with more energy, have a higher chance of colliding successfully and will collide more often.

How does increasing the concentration affect the reaction rate?

Increasing the concentration means particles are more numerous and closer together, so there is an increased chance of collisions.

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