MT 3: Reaction Rates

Grinding a solid into fine particles (ex: sugar granules)

• Increases rate of reaction

• Decreases rate of reaction

Leaving a solid in one large block (Ex: Sugar cube)

• Increases rate of reaction

• Decreases rate of reaction

Increasing the temperature will

• Increase rate of reaction

• Decrease rate of reaction

Decreasing pressure, allowing particles to move with more space (the 1st container has a decreased pressure) will...

• Increase rate of reaction

• Decrease rate of reaction

Changing the concentration of the particles from 80% to 40% will

• Increase rate of reaction

• Decrease rate of reaction

Adding a catalyst to the reactants will

• Increase rate of reaction

• Decrease rate of reaction

Fill in the blank with the correct words:

A catalyst ___________ the rate of reaction by _________ the activation energy.

• Increases; increasing

• Increases; decreasing

• Decreases; decreasing

• Decreases; increasing

In order for a chemical reaction to occur, there must always be... (select all that apply)

• a bond that breaks in a reactant particle

• reacting particles with a high charge

• an effective collision between reacting particles

• enough energy

Analyze the table below and select the statement that best explains the change that occurs.

• Due to an increase in temperature from trial 1 to trial 2, the rate of reaction was faster because the color change took less time

• Due to an decrease in temperature from trial 1 to trial 2, the rate of reaction was faster because the color change took less time

• Due to an decrease in temperature from trial 1 to trial 2, the rate of reaction was faster because the color change took more time