Reaction Rates

Products will form faster if____________

• the particle size of the reactants are larger.
• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

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

• larger

• smaller

• rectangular

• spherical

________ is the measure of how much area of an

object is exposed.

• Surface Area

• Catalyst

• Temperature

• Concentration

Grains of sugar have a greater _______ than a solid cube of

sugar of the same mass, and therefore will dissolve quicker in water.

• Surface Area

• Catalyst

• Temperature

• Concentratrion

Pick the TWO (2) options that will INCREASE the rate of a reaction.

• Reducing Heat

• Adding Catalyst

• Adding Heat

• Removing Catalyst

Which of the following will lower the rate

of reaction?

• adding an enzyme to the reaction

• decreasing the temperature from 40°C to

  10°C

• breaking a chunk of calcium up into

  smaller pieces

• increasing the amount of solute

  dissolved in a solution

Which factors increase the rate of a reaction.

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

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

• Slow collision frequency
• Allow less effective collision between the particles
• Neutralise the reaction
• increase collision between the particles thus increasing the rate.

Which of the following increase the reaction rate?

• less surface area
• lower temperature
• an inhibitor
• increased concentration

Why don't all collisions between particles cause a reaction?

• the particles also need to collide with a catalyst
• not all the particles collide with enough energy
• not all the particles collide at a high enough temperature
• the particles need to collide with each other twice