<< Chapter < Page Chapter >> Page >

Natural sciences

Grade 8

Matter: classification

Module 22

Separation of mixtures

  • Different methods of separation are used for different mixtures.

The educator will explain and may demonstratethe METHODS that are listed:

  • Sorting by hand – sort according to size, form and colour
  • Filtration – one of the substances is soluble
  • Evaporation – dissolves in water and water evaporates leaving salts behind
  • Separating funnel – two liquids with different densities
  • Distillation – use a Liebig condenser to heat, evaporate and condense

APPARATUS:

Sketch of filtration and distillation apparatus and a separating funnel.

Activity: select a method of separation

Select and write down a method of separation for the following mixtures:

Sand and salt

Beans and peanuts

Squash syrup and water

Oil and water

Different coins

Assignment

Give a step by step explanation with sketches of the method you would follow to:

a) separate sand from salt.

b) separate squash syrup from water.

1. Which method would you use to obtain fresh water from sea water?

2. Why is this method not used to add to fresh water sources?

3. What is the difference between a distillate and a filtrate?

4. Explain what fractional distillation is and name two industries in which it is used.

Project

How would you separate water and alcohol?

  • Also find out something about fractional distillation .
  • Suggestion: use what you have found out about the boiling point of substances (learning unit 3).
  • Sketches form an important part of a project !
  • Submit the project on the date set by the educator.

Assessment of the project

Were you able to plan the project (AS 1.1), collect data (AS 1.2) and evaluate and communicate your findings (AS 1.3), as well as apply knowledge (AS 2.4)?

[LO 1.1; LO 1.2; LO 1.3; LO 2.4]

Assessment

Learning outcome 1: Scientific investigations

The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

ASSESSMENT STANDARDS: We know this when the learner

1.1 is able to plan investigations;

1.2 is able to execute an investigation and collect data;

  • is able to evaluate data and communicate findings

Learning outcomes 2: Constructing science knowledge

The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

ASSESSMENT STANDARD: We know this when the learner

2.4 is able to apply knowledge.

Memorandum

Mixture Method

Sand&salt Filter

Beans&peanuts Manual sorting

Squash syrup&water Distillation

Oil&water Separating funnel

Different coins Manual sorting

Sketches – the correct apparatus

  1. Distillation
  2. Cost
  3. Distillate – fluid condenses after distillation
  4. filtrate – fluid that is filtered
  5. filtering at different boiling points, e.g. at oil refineries and in the spirtis (alcohol) idustry.

PROJECT

Alcohol boils at 79ºC – fractional distillation removes alcohol; water is left behind.

Regulation of temperature, using a thermometer is very important.

Sketch of how the Lieg condenser is set up is important.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natural sciences grade 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11050/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natural sciences grade 8' conversation and receive update notifications?

Ask