Rates Of Reaction Flashcards
1
Q
What are the four things that rate of reaction depends on
A
- temperature
- concentration
- catalyst
- surface area
2
Q
Equation for rate of reaction
A
Amount of product formed
ROR = ——————————
Time
3
Q
What are the three ways that the speed of reaction can be measured
A
- precipitation
- change in mass
- volume of gas given off
4
Q
Surface area test
A
- HCl and marble chips
- same volume of acid, crunch up chips
- volume of gas given off method (CO2) at regular intervals
5
Q
Concentration test
A
- magnesium metal and HCl
- change the concentration but keep the volume the same
- measure using a mass balance at regular intervals
6
Q
Temperature test
A
- HCl and sodium thiosulfate
- using precipitate method = yellow precipitate forms
- heat each solution in a water bath to change the temperature
7
Q
Catalyst test
A
- Decomposition of hydrogen peroxide
- use different catalysts
- measure the amount of oxygen gas produced at different intervals
8
Q
What is the collision theory
A
Rate of reaction depends on how often and how hard reacting particles collide
9
Q
Why does reaction rate slowdown as reaction progresses
A
There are less and less reactant particles left, so they collide less frequently and reaction rate slows down
10
Q
Anagram to remember collision theory
A
F - frequent R - rate of reaction E - energy S - successful collisions H - harder collisions
