Catalysts Chemistry

Which of these are the best choice of catalysts?

• Expensive and reusable

• Cheap and insensitive to impurities

• Cheap and easily poisoned

• Cheap and reusable

Tags

NGSS.HS-ETS1-3

The minimum amount of energy needed for colliding particles to react is called the

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

In homogeneous catalysis, reactants and catalysts are in the ___________ phase with each other.

• Different

• Same

In heterogeneous catalysis, reactants and catalysts are in a __________ phase with each other

• Different

• Same

Which of these are the BEST way to dispose waste catalyst? There are 2 correct answers.

• Landfill

• Reuse the waste catalysts

• Regenerate the waste catalysts

• Leaching by water

Tags

NGSS.HS-ETS1-3

NGSS.HS-LS2-7

What is a catalyst? Choose 2

• Something which decreases the rate of a reaction

• It is used up

• Something which increases the rate of a reaction

• It is not used up

Tags

NGSS.HS-PS1-5

How do catalysts speed up reactions?

• They provide another route for the reaction

• They give particles more energy

• They increase surface area

• They lower activation energy

Look at the graph. At what time does the reaction finish?

• 4 minutes

• 5 minutes

• 6 minutes

• 7 minutes

Tags

NGSS.MS-PS3-1

What is the rate of a chemical reaction? Choose 2.

• How quickly the reactants in a reaction are used up

• How quickly the reactants in a reaction are made

• How quickly the products in a reaction are used

• How quickly the products in a reaction are formed

Tags

NGSS.HS-PS1-5

Which of the following statements about catalysts is true?

• Catalysts are consumed in the reaction.

• Catalysts increase the activation energy of a reaction.

• Catalysts provide an alternative reaction pathway with lower activation energy.

• Catalysts decrease the rate of reaction.