Rates of Reaction

What must ALWAYS be measured to calculate the rate of reaction?

• Mass of product

• Mass of reactant

• Volume of gas produced

• Time

Which of the following happens to speed up a reaction by increasing the temperature?

• Particles have more kinetic energy

• Particles collide more

• Particles collide more frequently

• There are more successful collisions

• The particles have more activation energy

Tags

NGSS.HS-PS1-5

Why does powdered calcium carbonate react faster than lumps of calcium carbonate?

• Powder particles have more energy

• There is a greater surface area with a powder

• Particles move faster in a powder

• More frequent collisions happen

How does a catalyst increase the rate of a reaction?

• It lowers activation energy

• It provides an alternative route/path for the reaction

• There will be more successful collisions

• The catalyst gives energy to the reactants

Tags

NGSS.HS-PS1-5

If the concentration of a reactant is increased, what is the effect on the rate of reaction?

• The rate of reaction decreases.

• The rate of reaction increases.

• The rate of reaction remains unchanged.

• The reaction stops.

Tags

NGSS.HS-PS1-5

What effect does increasing the concentration of reactants have on the rate of reaction?

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

• It increases the rate of reaction.

• It stops the reaction.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the following factors does NOT affect the rate of a chemical reaction?

• Temperature

• Concentration of reactants

• Color of reactants

• Surface area of reactants

Tags

NGSS.HS-PS1-5

which factor that affect reaction rate is represented?

• Temperature

• Catalyst

• Surface Area

• Concentration

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

In standard conditions data for line B was recorded. If we run the reaction again with reactants at lower concentrations, which line of data would likely be recorded?

• A

• B, again

• C

• No reaction occurs

Tags

NGSS.HS-PS1-5

When is a reaction rate fastest?

• At the start

• In the middle

• Towards the end

• It is the same rate all the way through

Tags

NGSS.HS-PS1-5