Reaction Rates Review

Increase in temperature of the reactants can do one of the following

• Slow collision frequency
• Allow less effective collision between the particles
• Cause particles to lose speed
• Increase collision between the particles thus increasing the rate.

Which factors increase the rate of a reaction.

• increasing temperature
• increasing concentration
• increasing surface area
• all of these

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

Increasing the concentration of the reactants will slow down the reaction.

• false 
• true

How could we make this reaction happen more quickly?

• Decrease the concentration of the acid

• crush the chalk to increase the surface area

• Put the test tube in an ice bath

Activation energy is required to start a chemical reaction. What is activation energy?

• The energy needed for a reaction to occur
• The minimum amount of energy needed for a reaction to potentially occur
• The energy added by a catalyst
• The energy possessed by the products

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

• larger
• smaller

Which factors affect the rate of a reaction?

• temperature

• concentration

• surface area

• pressure

• catalyst

If you decrease the temperature...

• Reaction Rate will increase

• Reaction rate will decrease

If you decrease the concentration...

• Reaction Rate will increase

• Reaction rate will decrease