Rates Of A Chemical Reaction Flashcards
What are the signs of a chemical reaction taking place?
. Gas being produced
. Change in colour
. Change in odor
. Change in temperature
. Formation of a solid (precipation)
How do you increase the rate of a chemical reaction?
. Addition of a catalyst
. Smaller particle size/larger surface area
. Increased temperature
. Increased concentration
How is a reaction successful?
The reactants must collide with sufficient energy and with the proper orientation.
How does the temperature increase the rate of a chemical reaction?
If the temperature is increased, the particles have more energy and move quicker, therefore collide more often, resulting in a quicker reaction.
How does the concentration increase the rate of a reaction?
If the concentration of reactants is increased, there are more particles moving together, therefore more collisions and a quicker reaction.
How does decreasing particle size increase the rate of a reaction?
By decreasing the particle size of a reactant, we are increasing its surface area. The greater the surface area, the higher the chance of collisions and the faster rate of reaction.
How does using a catalyst increase the rate of a chemical reaction?
If a catalyst is present, the reacting particles can collide more successfully with less energy.
What is the rate of a reaction?
The rate of a reaction is a measure of how fast the reactants are being used up and how fast the products are being made.
What are the advantages of using a catalyst?
The reaction can take place at lower temperatures because the particles can collide with less energy also a catalyst is not used up in a chemical reaction.
