Chem Quiz Reaction Rates 4/11

Front 1

example of fast reaction

Back 1

explosion

Front 2

example of slow reaction

Back 2

decomposition of rust

Front 3

rate

Back 3

product/time

Front 4

catalyst

Back 4

lowers the energy of activiation-puts the particles together so you need less energy

Front 5

endothermic reaction

Back 5

A+energy-->CC

Front 6

what does an endothermic reaction look like on the chart

Back 6

lower at the beginning, higher at the end

Front 7

exothermic reaction

Back 7

A+B-->C + energy

Front 8

what does an exothermic reaction look like on the chart

Back 8

higher at the beginning, lower at the end

Front 9

factors affecting rates of reaction

Back 9

1. temperature-for every 10 degrees in temp, doubles the rate of reaction
2. concentration-adding particles will increase the rate
3. particle size-smaller particle size=larger surface area=faster reaction
4. catalyst-speeds up reaction-helps orient the molecules
5. inhibitor-slows down reaction

Front 10

effective collisions

Back 10

collisions must be effective in order for there to be a reaction

Front 11

what two things are needed for the collision to be effective

Back 11

1. colliding with adequate rate
2. correct angle

Front 12

kinetics

Back 12

the branch of chemistry considered with the rates and mechanics of reaction

Front 13

princeton clock

Back 13

clear--> yellow (intermediate)-->black
yellow shows intermediate product

Front 14

rochelle salt and hydrogen peroxide- H2O2

Back 14

-oxygen is reactive and kils germs when H2O2 breaks down
--kept in dark bottle because light causes it to break down
-colbalt chloride is a catalyst for the reaction-increases the rate of reaction but is not affected
-add peroxide to Rochelle salt-breaks down peroxide-
-end=water, colbalt chrloide
-shows how a catalyst works

Front 15

rate determining step

Back 15

the one that happens the slowest (only as fast as the slowest part)

Front 16

what do rates measure

Back 16

the speedof any change that occurs within an interval of time

Front 17

collision theory

Back 17

atoms, ions, and molecules can react to form products when they collide, provided that the particles have enough kinetic energy. particles lacking the necessary kinetic energy to react bouncees apart when they collide. collisions have to be effective