Catalysts

What is the rate of reaction?

• How much energy is needed for a reaction to occur.

• The energy required to break a bond.

• The time it takes for a reaction to occur.

• Collision Theory

Tags

NGSS.HS-PS1-5

What is collision theory?

• Molecules must collide in the correct orientation with enough energy to bond.

• Molecules need enough energy to collide and react.

• Atoms constantly collide and react.

• The minimum energy needed for atoms to react

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by giving them more energy

• by making them more available

What is necessary for a chemical reaction to occur?

• Correct orientation of particles when they collide

• particle collisions

• an increase or decrease in temperature

• particle collisions with sufficient energy

• a catalyst

Tags

NGSS.HS-PS1-5

Explain how increasing concentrations increases the rate of a reaction

• Less collisions occur

• More movement

• More collisions occur

• Less movement

Tags

NGSS.HS-PS1-5

How can you increase the surface area of a solid?

• Divide the solid into smaller pieces

• Get more solid

• Turn it into a gas

Which change in condition only affects reactions involving gases?

• Temperature

• Surface area

• Pressure

• Concentration

More collisions correspond to a: 

• Faster reaction rate  
• Slower reaction rate
• Constant reaction rate 
• None of the above

Tags

NGSS.HS-PS1-5

What criteria must be met for reactant collisions to result in a successful product?

• The reactants must collide with each other

• The reactants must collide with enough energy and be in the right positions

• The reactants must have enough energy to form the activated complex

List four factors that affects the rate of a reaction

• temperature

• concentration

• surface area

• volume

• catalysts

Tags

NGSS.HS-PS1-5