Rates of Reaction

What is the rate of a reaction?

• How fast something happens

• How slow something happens

• When two chemicals mix together and make something new

• change in concentration per unit time of any one reactant or product

What is the instantaneous rate of reaction

• Is the reaction time instantly

• Is the rate of reaction at any one particular time during the reaction

• Is the rate of reaction at multiple times during the reaction

• Is the rate of reaction initially during the reaction

2 factors affecting the rate of a reaction are

• Particle size

• Time

• Temperature

• Solubility

the nature of reactants affects the rate of reaction. Which has a faster reaction rate

• Covalent bonds

• Ionic bonds

Why do covalent bonds have a slower reaction rate?

• Double bonds need to be broken first

• Electron transfer must occur

• Single bonds need to be made first

• They aren't slower than ionic

Particle size affects rate of reaction how

• Large the particle size, the quicker the reaction due to a large surface area

• Dust particles have a very slow reaction

• Smaller the particle size, the quicker the reaction due to a large surface area

• Cutting potatoes up into smaller pieces doesn't help it cook faster

For a dust explosion to occur, which of the following must be present?

• Oxygen

• Methane

• Enclosed space

• Open space

This image indicates what about concentration?

• Decreasing concentration, decreases the rate of a reaction

• Having equal amounts of both increases rate of reaction

• Increasing concentration, increases the rate of a reaction

• Increasing concentration, decreases the rate of a reaction

This image tells you what about higher temperature in terms of rate of reaction

• Increase temperature, increase collisions as the particles have less energy and so collide more

• Increase temperature, decrease collisions

• Increase temperature, increase collisions as the particles have more energy and so collide more

• Decrease temperature which increases collisions so the rate of reaction increases

What is a catalyst according to chemistry

• A substance that speeds up the rate of a reaction without being used up in the reaction

• A substance that slows down the rate of a reaction without being used up in the reaction

• A substance that alters the rate of a reaction without being used up in the reaction

• A substance that slows down the rate of a reaction and is used up in the reaction