C3.2.1 - Mixtures Flashcards
What is a mixture?
Where several different substances are mixed together but not chemically joined.
Are mixtures easy to separate?
Yes
Are compounds easy to separate?
No
How do we separate a compound?
By carrying out a chemical reaction
What is a compound?
Different types of atom chemically bonded together.
The name of a compound usually ends in which 3 letters?
-ide
Iron + Sulphur –>
Iron sulfide
How can we separate a mixture of iron and sulfur?
Using a magnet
What happens to the properties of elements when they form a compound?
They change
How is iron sulfide different to iron and sulfur in a mixture?
- Iron sulfide is black
- Iron sulfide is non magnetic
- Iron is grey
- Iron is magnetic
- Sulfur is yellow
Is sea water a mixture or a compound?
A mixture of: water, sodium chloride and other salts
The graph shows the temperature changes of a solid when it is heated into a liquid. At which point in the graph is the solid undergoing a change in state? (melting)
