Chemistry rates of reaction

what is not a chemical reaction?

• temperature change

• staying the same

• colour change

• change in smell, or smell given off

• bubbling/ fizzing

what is the name given to a substance which speeds up a reaction, without being used up?

(a)  

label a piece of apparatus which can be used to collect gas :

as the concentration (a)   the greater the likelihood of successful collisions

as the temperature increases the kinetic energy ...................

• decreases

• increases

• stays the same

average rate =

• change in quantity over change in time

• change in time over change in quantity

the more collisions take place the .................... the rate of reaction

• faster

• slower

temperature is the measure of the average (a)   energy of the particles

a catalyst works by providing the reaction with an ........................ pathway for the reaction to occur.

• alternative

• opposite

at the end of the reaction a catalyst can be found chemically .......................

• unchanged

• different

• changed