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Samenvatting Werkcollege algemene chemie
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Concentratieberekeningen voor in de labo's in een overzichtelijke tabel Lector: Roald Santens
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CONCENTRATIEBEREKENINGENConcentratie: hoeveelheid van een bestanddeel in een gegeven hoeveelheid oplosmiddel of
oplossing
- Concentratietermen
Oplosmiddel of solvens (s)
Opgeloste stof of dissolutus (d)
Vormen samen de oplossing of solutio (S)
Naam Grootheid Eenheid Formule Definitie
Mol n Mol 6,022.1023 Aantal deeltjes per mol stof
Molaire massa MM of M g/mol Som Ar Relatieve massa van een
molecule (referentiewaarde
= 1,6605.10-27)
Massa-procent m% of ω gd/100gS md Aantal gram opgeloste stof
.100
m% mS per 100g oplossing
Volume-procent V% of Cd mld/100mlS Vd Aantal ml opgeloste stof per
.100
V% VS 100ml oplossing
Massa- m/V% of Cd gd/100mlS md Aantal gram opgeloste stof
.100
volumeprocent mV% VS per 100ml oplossing
Massa- ρ gd/LS md Aantal gram opgeloste stof
concentratie VS per liter oplossing
Molfractie of Xd Dimensieloos nd Aantal mol van 1 van de
molaire breuk (dissolutus n d+ n S componenten t.o.v. alle
) aanwezige componenten
nS
n d+ n S
XS (solutio)
Molariteit CM M of mol/L nd Aantal mol opgeloste stof
VS per liter oplossing
md
MM d . V S
Molaliteit Cm m of mol/kgs nd Aantal mol opgeloste stof
kg s per kilogram oplosmiddel
md
MM d . kg s
Equivalentiegetal n’ Dimensieloos Zuur: #zuurfuncties Factor voor het aantal
Base: #basefuncties functies die wegreageren of
Zout: #zuurfuncties vervangen worden in een
Oxide: #functies brutoformule
(zuur of base)
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