Rates of reaction

Temperature

1

As temperature is increased, particles have more .............

Energy

2

Which reaction was run at the lowest temperature?

C

3

Name a piece of lab equipment you could use to increase the temperature of a reactant. 

Bunsen burner, water bath, kettle, microwave etc

4

In terms of particle theory, explain why increasing the temperature leads to an increase in the rate of reaction.

Higher temperature means particles have more energy, and so more more and collide more often, leading to a higher rate of reaction.

5

O^o Kelvin, or absolute zero is the lowest limit of the thermodynamic temperature scale. What is its temperature in ^oC?

-273^oC

Concentration/Pressure

1

At a lower concentration of a reactant, there are more/less collisions

Less

2

What state of matter can we most easily change the pressure of?

Gas

3

Which reaction has the lowest reactant concentration?

C

4

Which has a higher concentration of HCl?

1:10 HCl to H₂O solution or 1:20 HCl to H₂O solution

1:10 HCl to H₂O solution

5

In chemistry, a measure of concentration is the ........... (Hint: it's also the name of a small mammal)

Mole

Surface Area

1

Which has a larger surface area; iron filings or an iron bar?

Iron filings

2

True or false? If you wanted to increase the rate of reaction you could use a powdered form of a reactant.

True

3

The idea that as particles have more energy, they hit each other more often is known as ............... theory 

Collision theory

4

Which of A, B and C has the largest surface area?

A

5

In terms of particle theory, explain why increasing the surface area leads to an increase in the rate of reaction. 

A larger surface area means that more particles are exposed to the other reactant, and hence there are more collisions. 

Catalysts

1

A catalyst ................. the rate of reaction.

Increases

2

Which of A or B is an UNcatalysed reaction?

B

3

A biological catalyst is also known as an ................

Enzyme

4

True or false? A catalyst gets used up in a reaction.

FALSE

5

Give an example of a catalyst.

Most heavy metals, enzymes, acids and bases etc

Miscellaneous

1

Reactants -> ..................?

Products

2

Chemical reactions can only happen if reactant particles react with enough ..............?

Energy

3

True or false? Reactions that happen slowly have a high rate of reaction.

FALSE

4

What are the two ways to measure the rate of a reaction?

1. Measure the rate at which a reactant is used up

2. Measure the rate at which a product is formed

5

If you wanted measure the rate of reaction between Zn and HCl, what would you measure?

The volume of H₂ gas produced over time.