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Natuurwetenskappe

Materie, meting en reaksies

Reaksies tussen soorte materie: sure en basisse

Opvoeder afdeling

Memorandum

Stap 1: Dit het blou geword, want koeksoda is ‘n basis

Stap 2: Nee

Stap 3: Dit het ligter geword

Stap 4: Dit word baie ligter en lemmetjiegroen

WAARNEMING:

  • Neutrale

Leerder afdeling

Inhoud

Aktiwiteit: om vas te stel wat gebeur as ‘n suur en alkali gemeng word [lu 1.2, lu 1.3]

Ons het reeds ontdek dat ‘n neutrale oplossing nie ‘n suur of ‘n basis is nie.

Wat sal gebeur wanneer ons ‘n suur en ‘n basis meng? Kom ons vind uit!

  • Gebruik ‘n BTB-oplossing as indikator
  • Ander benodigdhede:

100 ml witasyn

150 ml koeksoda-oplossing

STAP 1: Voeg ‘n paar druppels van die koeksoda-oplossing by die BTB-indikator.

Wat neem jy waar?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

STAP 2: Voeg die helfte van die asyn by die koeksoda-oplossing

Is die oplossing nou neutraal?

_____________________________________________________________________

_____________________________________________________________________

STAP 3: Om dit vas te stel, voeg druppels van die mengsel by die BTB-indikator.

Wat neem jy waar?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

STAP 4: Indien geen verandering plaasvind nie, voeg die helfte van die oorblywende asyn by die koeksoda-oplossing en herhaal stap 3.

STAP 5: Toets weer die oplossing en herhaal stap 3 en 4 totdat ‘n verandering waargeneem word.

Wat neem jy waar?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

WAARNEMING:

  • Saam het die asyn en koeksoda ‘n ________________________ oplossing gemaak. Dit is nie ‘n suur of ‘n basis nie.

Die proses waartydens sure deur basisse vernietig word of waartydens basisse deur sure vernietig word, word NEUTRALISERING genoem.

Assessering

Leeruitkomste 1: 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.

Assesseringstandaard 1.2: Dit is duidelik wanneer die leerder ondersoeke uitvoer en data versamel: organiseer en gebruik apparaat/toerusting of bronne om inligting in te win en te noteer.

Assesseringstandaard 1.3: Dit is duidelik wanneer die leerder data evalueer en bevindings kommunikeer: veralgemeen in terme van relevante aspekte en beskryf hoe die data die veralgemening onderskryf.

Questions & Answers

what is biology
Hajah Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
what is biology
Victoria Reply
HOW CAN MAN ORGAN FUNCTION
Alfred Reply
the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
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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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