2 Flashcards

1
Q

wet van behoud van materie

A

materie kan nie geskep of vernietig word nie maar slegs van vorm verander

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2
Q

wat is valenselektrone?

A

dit is die elektrone in die buitenste energievlak

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3
Q

maniere om roes te verhoed

A
  1. verf,smeemiddels en olie
  2. elektroplantering
  3. galvanisering
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4
Q

wat is sure?

A
  • smaak suur
  • suuroplossings in water gelei elektrisiteit
  • eksotermiese reaksie
  • kan deur basisse geneutrakiseer word
  • tenminste 1 H-atoom
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5
Q

wat is basisse?

A
  • kan sure neutraliseer
  • water oplos word dit n alkali genoem
  • voel seperig en proe bitter
  • gelei elektrisiteit
  • vorm hidroksiedione
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6
Q

wat is natuurlike indiktators?

A

tee ,rooikool ,beet

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7
Q

wat is chemiese indektators?

A
lakmoes
broomtimolblou
fenolftaleïen 
metieloranje
universele indiktators
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