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GCSE Chemisty*** > Rates Of Reaction > Flashcards

Flashcards in Rates Of Reaction Deck (10):
1

What are the four things that rate of reaction depends on

- temperature
- concentration
- catalyst
- surface area

2

Equation for rate of reaction




Amount of product formed
ROR = ——————————
Time

3

What are the three ways that the speed of reaction can be measured

- precipitation
- change in mass
- volume of gas given off

4

Surface area test

- HCl and marble chips
- same volume of acid, crunch up chips
- volume of gas given off method (CO2) at regular intervals

5

Concentration test

- magnesium metal and HCl
- change the concentration but keep the volume the same
- measure using a mass balance at regular intervals

6

Temperature test

- HCl and sodium thiosulfate
- using precipitate method = yellow precipitate forms
- heat each solution in a water bath to change the temperature

7

Catalyst test

- Decomposition of hydrogen peroxide
- use different catalysts
- measure the amount of oxygen gas produced at different intervals

8

What is the collision theory

Rate of reaction depends on how often and how hard reacting particles collide

9

Why does reaction rate slowdown as reaction progresses

There are less and less reactant particles left, so they collide less frequently and reaction rate slows down

10

Anagram to remember collision theory

F - frequent
R - rate of reaction
E - energy
S - successful collisions
H - harder collisions