C3.2.1 - Mixtures Flashcards Preview

SHHS - Science - C2.2 - Separation Techniques - Year 8 > C3.2.1 - Mixtures > Flashcards

Flashcards in C3.2.1 - Mixtures Deck (12):
1

What is a mixture?

Where several different substances are mixed together but not chemically joined.

2

Are mixtures easy to separate?

Yes

3

Are compounds easy to separate?

No

4

How do we separate a compound?

By carrying out a chemical reaction

5

What is a compound?

Different types of atom chemically bonded together.

6

The name of a compound usually ends in which 3 letters?

-ide

7

Iron + Sulphur -->

Iron sulfide

8

How can we separate a mixture of iron and sulfur?

Using a magnet

9

What happens to the properties of elements when they form a compound?

They change

10

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

11

Is sea water a mixture or a compound?

A mixture of: water, sodium chloride and other salts

12

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)