Chemical Reactions Flashcards
1
Q
When element react, what do they produce?
A
Compunds
2
Q
Mass of the product = what?
A
The mass of the reactants
3
Q
True or false, products have DIFFERENT properties to the reactants.
A
True
4
Q
During a chemical reaction, what is either given off or taken in?
A
Heat
5
Q
What type of change is…
a) hard to undo?
b) easy to undo?
A
a) Chemical
b) Physical
6
Q
What is synthesis?
-give an example
A
When two or more substances join together to make a new single substance.
-e.g. Iron + sulfur –> Iron Sulphide
7
Q
What is decomposition?
-give an example
A
When a substance breaks down into several substances
-e.g. Calcuim Carbonate –> Calcium Oxide + Carbon dioxide
8
Q
What is oxidation?
-give an example
A
When a substance gains opxygen during a chemical reaction.
-e.g. copper + oxygen –> copper oxide
