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Natuurwetenskappe

Graad 8

Materie: klassifikasie

Module 22

Skeiding van mengsels

  • Afhangend van die tipe mengsel kan verskillende metodes van skeiding toegepas word.

Die onderwyser gaan die volgende METODES verduideliken moontlik demonstreer:

  • Handsortering – sorteer t.o.v. groottes, vorm en kleure
  • Filtrasie – een van stowwe is oplosbaar; indamping
  • Verdamping – los op in water en damp in
  • Skeitregter – twee vloeistowwe met verskillende digthede
  • Distillasie – gebruik 'n kondensor en distilleerfles; verhit en verdamp en kondenseer

APPARAAT:

Skets van filtreer- en distilleerapparaat, asook skeitregter.

Aktiwiteit: kies skeidingsmetode

MENGSEL METODE
Sand en sout
Boontjie en grondboontjies
Koeldrankstroop en water
Olie en water
Verskillende muntstukke

Opdrag

Verduidelik stapsgewys met behulp van sketse hoe jy te werk sal gaan om:

a) sand en sout te skei;

b) koeldrankstroop en water te skei.

1. Watter metode sou jy gebruik om varswater uit seewater te kry?

2. Hoekom maak die mens nie van die metode gebruik om varswaterbronne aan te vul nie?

3. Wat is die verskil tussen 'n distillaat en 'n filtraat?

4. Wat is fraksionele distillasie en noem twee bedrywe waar dit gebruik word.

Projek

Hoe sou jy water en alkohol skei?

  • Vind ook meer uit oor fraksionele distillasie .
  • Wenk: gebruik die kookpunte waaroor jy vroeër meer moes uitvind (leereenheid 3).
  • Sketse is belangrik!
  • Handig projek in op datum deur onderwyser bepaal.

Assessering van projek

Kon jy die projek beplan (AS 1.1), data insamel (AS 1.2) en bevindinge evalueer en kommunikeer (AS 1.3), asook enige kennis toepas (AS 2.4)?

[LU 1.1; 1.2; 1.3; 2.4]

Assessering

LU 1

Wetenskaplike Ondersoek

Die leerder is in staat om met selfvertroue op weetgierigheid oor natuurlike verskynsels te reageer, en om binne die konteks van wetenskap, tegnologie en die omgewing verbande te ondersoek en probleme op te los.

Dit is bewys as die leerder:

1.1 ondersoeke kan beplan;

1.2 ondersoeke kan uitvoer en data kan insamel;

1.3 data kan evalueer en bevindinge kan kommunikeer.

LU 2

Wetenskaplike Kennis

Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Dit is bewys as die leerder:

2.1 sinvolle inligting kan onthou;

2.2 inligting in kategorieë kan plaas;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

Memorandum

Skeiding van mengsels

AKTIWITEIT: Kies skeidingsmetode

MENGSEL METODE
Sand en sout Filtreer
Boontjie en grondboontjies Handsortering
Koeldrankstroop en water Distillasie
Olie en water Skeitregter
Verskillende muntstukke Handsortering
  • Sketse – regte apparaat

1. distillasie

2. koste

3. distillaat – vloeistof kondenseer na distillasie

filtraat – vloeistof wat filtreer

4. filtrasie deur verskillende kookpunte, bv. olieraffinering en spiritualieë- (alkohol) bedryf

PROJEK:

  • Alkohol kook by 79 °C – fraksionele distillasie verwyder alkohol; water bly agter
  • Regulering van temperatuur met termometer uiters belangrik

Skets van Liebiegkondensor-opstelling belangrik.

Questions & Answers

how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
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
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Source:  OpenStax, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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