Quiz: Chemical Reactions and Rates

Which of the following would increase the rate of a chemical reaction?

• Freezing the chemicals

• Increasing the temperature of the reagents

• Removing a catalyst

• Using less chemicals

Which of the following would increase the rate of a chemical reaction?

• Removing a catalyst

• Diluting the chemicals

• Decreasing the temperature

• Adding a catalyst

Which of the following would increase the rate of a chemical reaction?

• Lowering temperatrure

• Removing a catalyst

• Making the chemicals more concentrated

• Using less chemicals

Which of the following would increase the rate of CO2 made using marble chips and HCl?

• Lowering the temperature

• Crushing the marble chips

• Using less acid

• Using bigger marble chips

Which of the following colours represent the solution with the largest particle size?

• Red

• Blue

• Both

• None

Which of the following lines represents the chemical with the lower concentration?

• Red

• Blue

• Both

• None

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

• catalyst

• product

• reactant

• solute

To slow down a chemical reaction you will do one of the following:

• Place the reactants in hot water

• Place the products in ice bath

• Place the reactants in a ice bath

• Keep stirring the reactants with a stirring rod

exothermic reactions ...

• releases heat into a system.

• takes heat up from the environment

• releases energy into the system

• releases energy into the environment

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