S4 - Rates of reactions Flashcards
1
Q
What can differ in comparing reactions?
A
Different rates
2
Q
Give an example of a slow reaction
A
Rusting of iron
3
Q
Give an example of a moderate speed reaction
A
A metal, like magnesium, reacting with an acid to produce a gentle stream of bubbles
4
Q
Give an example of a fast reaction
A
An explosion
5
Q
What four things do rates of reaction depend on?
A
- Temperature - Concentration (or pressure for gases) - Catalyst - Size of particles (or surface area)
6
Q
How can you increase the rate of a reaction?
A
- Increase temperature - Increase concentration - Add a catalyst - Crush solid reactants into smaller pieces (bigger sa)
7
Q
On a typical graph for rates of reaction, what line would show the quickest reaction?
A
The line that becomes flat in the least time
8
Q
What does the lowest gradient show?
A
The lowest reaction
9
Q
What line show the fastest reaction?
A
B
10
Q
What line shows a fast reaction with more reacants?
A
A
11
Q
What lines shows the slowest reaction?
A
C
12
Q
A
