Separating Mixtures

 A mixture is made when two or more substances are combined, but they are not combined chemically.
General properties of a mixture:
The components of a mixture can be easily separated.
The components each keep their original properties.
The proportion of the components is variable.
A mixture is the combination of two or more substances that can be easily separated.
True or False?

• True
• False

 Filtration is a common method of separating an insoluble solid from a liquid. An example of a mixture is sand and water. This process involves the use of a filter paper placed in a filter funnel. The funnel is placed in a beaker and the mixture of water and sand is poured into the funnel. The liquid part drains through the filter paper into the beaker, leaving the solid sand particles trapped on the filter.
Filtration is a common method of separating an insoluble solid from a liquid.
True or False?

• True
• False

In filtration, the liquid part collected is called the filtrate and the solid bit that remained on the filter paper is called the residue.
In filtration, what is the part that remains called?

• Solid
• Filtrate
• Remainder
• Residue

In some cases there are suspension mixtures where the solid particles are too fine to be separated with a filter. In these cases, sometimes a centrifuge is used. Centrifuges are mechanical devices that spin at very high speeds. These high speeds allow the solid particles in suspensions to settle very quickly.
When is a centrifuge used?

• where the mixture is chemically combined
• for big particles
• for large amounts
• where the solid particles are too fine to be separated with a filter

Evaporation is good for separating a mixture (solution) of a soluble solid and a solvent. The process involves heating the solution until the solvent evaporates (turns into gas) leaving behind the solid residue.
Evaporation is good for separating a mixture (solution) of a soluble solid and a solvent.
True or False?

• True
• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What type of tool is this?

• Sieve/Strainer

• Filter

• Magnet

• Settling

Name this tool

• Sieve/Strainer

• Magnet

• Settling

• Filter

What is the best method of separation for removing sand from water?

• Sifting

• Sorting

• Evaporation

• Magnetic attraction

• Filtration

When substances are combined as a mixture, _______________.

• they keep their physical properties

• their physical properties combine

• their physical properties change

• they lose some of their physical properties

How to BEST separate pebbles and water?

• magnet

• hands

• tweezer

• strainer