6.1 Chemical Change & Rate of Reaction Flashcards
1
Q
Define a physical change
A
Don’t produce any new chemical substances
2
Q
Give an example of a physical change
A
Ice melting
3
Q
Define a chemical change
A
New chemical substance is formed that have different properties to the reactants
4
Q
List 3 signs that a new substance has formed via chemical reaction
A
- Colour Changes
- Temperature Changes
- Effervescence
5
Q
List 4 factors affecting the rate of reaction
A
- Concentration or Pressure (gas)
- Surface area of reactants
- Temperature of the reaction
- Presence of a catalyst
6
Q
Define a catalyst
A
Catalysts are substances which speed up the rate of a reaction without themselves being altered or consumed in the reaction
7
Q
Formula for rate of reaction?
A
Time
8
Q
A
