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Samenvatting Scheikunde – 3 VWO – H2 Stoffen $3.30   Add to cart

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Samenvatting Scheikunde – 3 VWO – H2 Stoffen

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Samenvatting: Scheikunde – 3 VWO – H2 Stoffen

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  • December 27, 2021
  • 4
  • 2019/2020
  • Summary
  • Secondary school
  • 3
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Samenvatting Hoofdstuk 2 Stoffen
§2.2A Waar houden scheikundigen zich mee bezig?
Chemie = Scheikunde
Zuivere stof = Geen mengsel  Mengsel bevat meerdere stoffen
§2.2B Afvalstoffen
KCA = Klein Chemisch Afval (bv batterijen en medicijnen)
§2.2C Vloeistoffen
De kleur van een stof is een stofeigenschap
Aanwezigheid van een bepaalde stof  Indicator gebruiken
§2.2D Gassen
Kamertemperatuur = 25 °C
De stoffen stikstof, zuurstof, koolstofdioxide, ammoniak en zoutzuurgas zijn stoffen die bij
kamertemperatuur gasvormig zijn
0 °C = 273 K 0 K = -273 °C
0 Kelvin = Absolute nulpunt
Een gloeiend houtstaafje blijft in lucht langer gloeien dan in een buis met lucht of zuurstof.
In een buis met zuurstof gloeit een houstaafje (heel even) feller dan in lucht.
Lucht is een mengsel van o.a. zuurstof en stikstof.
Volume-%  Bv in lucht zit 21 volume-% zuurstof  Dit betekent dat er in 100 ml lucht, 21
ml zuurstof zit.
Concentratie = Hoog of laag percentage van de stof
Hoeveelheid = Hoog of laag aantal van de stof
Hydrofiele stof = Lost op in water
Hydrofobe stof = Lost niet op in water
Ammonia = Ammoniak + water
Zoutzuur = Waterstofchloride + water

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