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Samenvatting Chemie theorie
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Samenvatting van basisbegrippen chemie
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Basisbegrippen chemie en praktijk Les 1Hoofdstuk 1:
1.1 Inleiding van de materie
Materie
Zuivere stoffen mengsels
Enkelvoudig of samengesteld homogeen of heterogeen
- Zuiverstof dezelfde deeltjes
- Enkelvoudig: één atoomsoort vb. zuurstofgas O2
- Samengestelde: - meer dan één atoomsoort vb. 5HéO) water
Aggregatietoestand: vast, gas vloeibaar
- Fysische eigenschappen: massa dichtheid hardheid fysische omzetting: behouden van
deeltjes (vb. koken van water)
Chemische eigenschappen
Chemische omzetting (reactie)
Mengsel: krijg als je twee zuivere stoffen mengt.
Heterogeen mengsel: geen perfecte mening
- samengestelde deeltjes zijn te onderscheiden
- eigenschappen zijn niet identiek in elk punt
Suspensie: troebel mengsel van een vaste stof in een vloeistof
Vb. fijn krijt in water
Emusie: ondoorzichtig troebel mengsel van niet mengbare vloeistoffen
Vb. oliedruppeltjes in water
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