Collision Theory Flashcards
State four factors that can affect rate of reaction
temperature, concentration, particle size and the presence of a catalyst. It can be calculated by measuring changes in reactants/products.
How does concentration affect the rate of reaction?
If the concentration of reactants is increased, there are more reactant particles moving together. There will be more collisions and so the reaction rate is increased.
Controlled Variable meaning
based on a detailed analysis of why target variables might be related.
What does the term ‘rate of reaction’ mean?
the speed at which a chemical reaction takes place
Describe how the particles are arranged in a liquid.
particles are quite close together and move with random motion throughout the container
examples of chemical reactions
brewing beer
Digestion
Burning Fuel
What are some of the signs that a chemical reaction
change in color, energy change (temperature change or light produced), gas production, something burning, and the formation of a precipitate
Controlled Variable meaning
based on a detailed analysis of why target variables might be related.
Independent Variable Meaning
A variable that is being controlled
Dependent Variable meaning
Something you can change
State one way of measuring the rate of reaction.
measuring the volume of gas given off by a reaction over time.
How does surface area affect the rate of reaction between a solid and a liquid?
the larger the surface area of the solid, the faster the reaction will be.
It a substance has a pH of 2, how would you classify it?
A acide
What does Ph mean
Potential of Hydrogen
What is the pH of a neutral substance?
7
