Rate of Reaction N5

Which of the following will speed up a chemical reaction?

• Lower concentration

• Lower temperature

• Bigger particle size

• Add a catalyst

Which of the following will slow down a chemical reaction?

• Lower concentration

• Increase temperature

• Increase particle size

• Add a catalyst

Which of these does NOT affect rate of reaction at all?

• Temperature

• Concentration

• Particle Size

• Volume of liquid

Which of the following is not true about catalysts?

• They speed up a reaction

• They get used up during a reaction

• There are specific catalysts for different reactions

• You can reuse them

Which Reaction would be the fastest?

• A

• C

• D

• E

In a reaction, the mass lost in 30 seconds was 2 g. What is the average rate of reaction, in g s⁻¹, over this time?

• 1/30

• 30/2

• 1/2

• 2/30

A student measured the volume of hydrogen gas produced when zinc lumps were added to dilute hydrochloric acid.

Calculate the average rate of reaction, in cm3 s⁻¹, between 10 and 30 seconds. (TYPE ONLY THE NUMBER)

The volume of gas collected in 2 minutes was 5cm³.

What was the average rate of reaction over this time?

• 0.2

• 0.4

• 2.5

• 5

The volume of gas collected in 2 minutes was 5cm³.

What are the units for the average rate of reaction?

• cm³/min^-1

• cm³min^-1

• min/cm³

• min cm^-3

Which reaction is the fastest?

• A

• B