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  • GETSenPhaseNS display tagshide tags

    This module and collection are included inLens: Siyavula: Natural Sciences (Gr. 7-9)
    By: Siyavula

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Om vas te stel wat gebeur as ‘n suur en alkali gemeng word

Module by: Siyavula Uploaders. E-mail the author

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.

Figure 1
Figure 1 (graphics1.png)

Wat neem jy waar?

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

Figure 2
Figure 2 (graphics2.png)

Is die oplossing nou neutraal?

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

Figure 3
Figure 3 (graphics3.png)

Wat neem jy waar?

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

Figure 4
Figure 4 (graphics4.png)

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

Figure 5
Figure 5 (graphics5.png)

Wat neem jy waar?

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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.

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Definition of a lens

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A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

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