c6: the rate and extent of chemical change

state the factors that affect the rate of chemical reactions.

1. the concentration of reactants in solution

2. the pressure of reacting gases

3. the surface area of solid reactants

4. the temperature

5. the presence of catalysts

what is the collision theory?

that chemical reactions can only occur when reacting particles collide with each other and with sufficient energy

what is activation energy?

the minimum amount of energy that particles must have to react

how do catalyst increase the speed of a reaction?

catalysts increase the rate of reaction by providing a different pathway for the reaction that has a low activation energy

how is equilibrium reached in a reversible reaction?

when the reversible reaction occurs in apparatus which prevents the escape of reactants and products, equilibrium is reached when the forward and reverse reactions occur at exactly the same rate

what happens when the concentration of the products or reactants is changed?

the system is no longer at equilibrium and concentrations of all substances will change until equilibrium is reached again