Summary
Samenvatting Chemisch Rekenen Bulletin
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Chemisch rekenen Bulletin
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Chemisch Rekenen Bulletin ~ Rik Bouwels Chemisch rekenen schema (altijd als eerste boven een toets
schrijven)
Vm = 22,4 dm3/mol bij T=273K; 24,5 dm3/mol bij T=298K
Dichtheid gebruik je bij zuivere vloeistoffen, molariteit bij oplossingen
Volume% = (aantal mL stof/totaal aantal mL) X 100%
Massa% = (aantal g stof/totaal aantal g) X 100%
ppm = parts per million = X 106
rendement = (werkelijke opbrengst/theoretische max. opbrengst) X 100%
Stappenplan
1. Schrijf eerst alle belangrijke getallen op met de juiste eenheden
2. Schrijf daaronder concreet wat gevraagd wordt 1
Voorbeeld:
Aanwezig: 6,00 M NaOH; 0,5 L H2O
Gevraagd: aantal gram NaOH
3. Reken uit volgens het stappenplan. Schrijf overal eenheden bij
1
Zo wordt helder wat er verwacht wordt en kan het schema makkelijker geïnterpreteerd worden
1
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