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Natuurwetenskappe

Materie, meting en reaksies

Materie en meting

Opvoeder afdeling

Memorandum

Water:

  • H 2 O
  • Waterstof en suurstof
  • Die elemente suurstof en waterstof het met mekaar verbind. Dit het ‘n nuwe stof, nl. Water, gevorm wat dus uit twee soorte atome bestaan. Die atome het nou saamgebind om ‘n watermolekule te vorm.
  • Ja, die elemente word in ‘n vaste verhouding gekombineer om ‘n nuwe stof te vorm met nuwe eienskappe.

Opdrag2:

1.

  • 500 suurstofatome
  • 1 000 suurstofatome

2. Kombinasie

FORMULE KOMBINASIE
O 2 Suurstofmolekule: Twee suurstofatome
NaCl Natriumchloried (tafelsout): een atoom natrium en een atoom chloried
N 2 O 5 Natriumoksiedmolekule: Twee natriumatome kombineer met 5 suurstofatome
Fe 2 O 3 Ysteroksied: Twee ysteratome kombineer met 3 suurstofatome
MgCl 2 Magnesiumchloried: Een magnesiumatoom kombineer met 2 chloriedatome
CO Koolstofmonoksied: Een koolstofatoom verbind met een suurstofatoom

Leerder afdeling

Inhoud

Aktiwiteit: om die samestelling van stowwe aan die hand van chemiese simbole en formules te kan beskryf [lu 2.3]

Wanneer ons die fisiese of chemiese eienskappe van ‘n stof ken, kan ons dit gebruik om ‘n ander stof te maak. Water is bv. die beste oplosmiddel, want baie stowwe los daarin op. Ons kan die verbinding, water, ook gebruik om gasse soos waterstof en suurstof te maak. Ons kan ook water maak deur hierdie twee gasse te meng.

Ons gebruik chemiese simbole vir elemente en chemiese formules vir verbindings. Hier volg ‘n paar chemiese simbole:

  • Ag (simbool) staan vir silwer
  • Fe staan vir yster
  • Pb staan vir lood
  • Au staan vir goud

Probeer om die samestelling van ‘n watermolekule te illustreer:

  • Skryf die chemiese formule vir water neer.

_____________________________________________________________________

  • Uit watter twee elemente bestaan water?

__________________________________ en _______________________________

  • Wat moes met die twee elemente gebeur het om water te vorm?

Gebruik die woorde elemente , atome en molekule in jou beskrywing.

_____________________________________________________________________

_______________________________________________________________________________________________________________________________________________________________________________________________________________

  • Sou jy sê hierdie verbinding is in ‘n vaste verhouding of kan dit verander word na goeddunke? Motiveer jou antwoord.

_____________________________________________________________________

_______________________________________________________________________________________________________________________________________________________________________________________________________________

_____________________________________________________________________

  • Stel die atoomverbindings van water grafies voor:

Opdrag 2

Probeer nou om die chemiese formule van koolstofdioksied te ontleed:

Koolstofdioksied is ‘n verbinding wat uit twee soorte atome bestaan. Die chemiese formule is:

CO 2

Hierdie chemiese formule beteken dat een koolstofatoom met twee suurstofatome kombineer om koolstofdioksied te vorm. Met ander woorde, ons kan sê dat die verhouding van koolstofatome tot suurstofatome in koolstofdioksiedmolekules 1:2 is.

1. Hoeveel suurstofatome is nodig indien daar:

  • 250 koolstofatome is?_______________________________________________
  • 500 koolstofatome is?_______________________________________________

2. Werk die kombinasies van die volgende formules uit:

FORMULE KOMBINASIE
O 2 ____________________________________________________
NaCl ____________________________________________________
N 2 O 5 ____________________________________________________
Fe 2 O 3 ____________________________________________________
MgCl 2 ____________________________________________________
CO ____________________________________________________

Assessering

Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder inligting interpreteer: identifiseer kernidees in die teks, vind patrone in aangetekende data en maak gevolgtrekkings uit inligting in verskeie vorme (prente, diagramme, ens.).

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
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Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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