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College aantekening+uitwerking powerpoints analytische chemie

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College aantekening+uitwerking powerpoints analytische chemie

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Uitwerking PowerPoints Analytische chemie:

Wk1 Zuren en Basen

Chemische analyse:

- Doel van analytische chemie: analyseren van chemische verbindingen en mengsels (zowel
kwalitatief als kwantitatief.
- Chemische vraagstukken oplossen: reactievergelijkingen-> mol-> concentratie-eenheden.

Concentratie-eenheden:

- Massapercentage % (w/w).

- Volumepercentage % (v/v).

- Parts per million : ppm (mg/kg of ml/m3)

- Soortelijke massa s.m. (g/cm3)

- Dichtheid d (g/cm3)

- Soortelijke gewicht s.g.

- Droge stof d.s. g/100 g

- Molariteit M (mol/L)

De mol -> gram:
Aantallen:

- Paar=2
- Dozijn= 12
- Gros= 144
- Mol= 6,022 x^23 -> middel om aantallen zeer kleine deeltjes (moleculen) weer te geven.

Rekenen met aantal mol:




Zuur en base:

- Dagelijks leven: zuur tegenover zoet.
- Scheikunde: zuur tegenover base.
- Zuur= Een verbinding die H+-ion(en) kan afstaan.
- Base= Een verbinding die H+-ion(en) kan opnemen.

pH:

- pH= -log (H+) (=concentratie in mol/l)
- (H+)= 10^-pH

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