colllision theory Flashcards
effect on concentration on rate of reaction
more particles per unit volume
so collision frequency is higher
more successful collisions per unit time
disapearing cross experiment
effect of concentration on rate can be demonstrated by reacting sodium thiosulphate with hydrochloric acid
solid sulphur is slowly produced
you can’t see mixture any longer, meausred by black cross under mixture
rate is calculated by 1/time taken
how surface area affects rate
more of the solid is exposed to the other particles
so collision frequency is higher
so there are more successful collisions per unit time
marble chip experiment
effect on surface area is demonstrated by reacting calcium carbonate marble chips with hydrochloric acid
input: size of CaCO3 chips
output: volume of C02
volume of Co2 is measured using a gas syringe or inverted meauring cylinder in water
