14 Questions
Increasing the ______ increases the rate of reaction because the particles collide more often with more energy.
temperature
Concentration refers to the number of ______ particles per unit volume.
reactant
Only exposed particles at the ______ are able to collide with other reactant particles to form products.
surface
The smaller the ______ size the faster the reaction.
particle
Catalysts speed up the rate of reaction by providing an alternative reaction pathway that lowers the ______ energy.
activation
The higher the ______ of the reactants, the faster the rate of reaction will be.
concentration
Four indications that a chemical reaction has taken place are: temperature change, colour change, formation of a ______, and fizzing/bubbling.
precipitate
According to the Collision Theory, reactant particles must collide with enough ______ to overcome the activation energy barrier.
energy
Reaction Rate is the speed of a chemical reaction, which is the time it takes for the reactants to be converted to ______.
products
A reaction with a ______ rate of reaction would take a long time for the reactants to be turned into products.
slow
The four factors that affect the rate of a chemical reaction are: temperature, concentration, particle size or ______, and use of a catalyst.
surface area
If the temperature is increased, the particles have more ______ and so move quicker.
energy
For a reaction to occur, the particles reacting must collide with each other with the correct ______.
orientation
The ______ energy is the amount of energy needed for a chemical reaction to proceed.
activation
Study Notes
Indications of a Chemical Reaction
- Temperature change
- Colour change
- Formation of a precipitate
- Fizzling or bubbling, indicating gas production
Collision Theory
- Reactant particles must collide with enough energy to overcome the activation energy barrier
- Reactant particles must collide with the correct orientation
- Most collisions don't result in the formation of products
Activation Energy
- The minimum amount of energy that molecules need to possess to have successful collisions and form products
- The energy needed for a chemical reaction to proceed
Reaction Rate
- The speed of a chemical reaction (time it takes for reactants to be converted to products)
- Slow rate of reaction: takes a long time for reactants to be converted to products
- Fast rate of reaction: takes a short amount of time for reactants to be converted to products
Factors Affecting Reaction Rates
- Temperature: increasing temperature increases the rate of reaction due to more energetic particles
- Concentration: increasing concentration increases the rate of reaction due to more particles colliding
- Particle size or surface area: increasing surface area increases the rate of reaction due to more exposed particles colliding
- Use of a catalyst: lowers the activation energy, increasing the rate of reaction
Identify the signs of a chemical reaction and understand the principles of Collision Theory, including the conditions necessary for successful collisions.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
