rate of reaction Flashcards
both equations for rate of reaction
meanRoR = quantity of reactant used / time taken
mean RoR= quantity of product formed/time taken
what 3 units can measure RoR
g/s (mass)
cm^3 /s (volume)
mol/s (moles)
list 5 factors that affect RoR
temperature concentration pressure surface area catalyst
what must happen for a reactant to occur
particles must collide with each other with sufficient energy to reach the activation energy
how does pressure affect RoR
increased number of collisions between reactants
increases rate of reaction
how does temperature affect RoR
thermal-> kinetic energy means particles move faster
reactants how collide faster and with more energy
so more collisions have sufficient energy to react
how does SA increase RoR
smaller particles inc RoR
inc SA means more collisions in surface so inc RoR
how do catalysts affect RoR
reduce activation energy so less energy needed for successful collisions
faster RoR
what is the first step of a titration equation
find moles by doing
moles = (mass x volume) / 1000
what is the second step in a titration equation
do ratio, either 1:1 or 2:1
what is the third step in a titration equation
calc concentration by doing
conc= (molesx1000) /volume
what is activation energy
minimum amount of energy needed for a successful reaction