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Samenvatting Wc 3 Zuren & Basen
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Wc 3 Zuren & Basen. Behandeld o.a. : zurenbasenresonantiestructurenabc-formulepkapkb
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Take home messages voor thema 3: Zuren en basen Het sterkere zuur = lager pKa bepalen met ARIO
Atoom (grootte>EN) > Resonantie > Inductie > Orbitaal hybridisatie (sp>sp2>sp3)
pH berekenen
o Voor oplossen enkel zuur of base Short-cut of ABC-formule:
HA0/Ka ≥ 100 dan shortcut √(HA0*Ka) of als HA0/Ka < 100 dan ABC of
als HA0/Ka ≤ 0.01 dan sterk zuur dus [HA0]=[H+]).
Gebruik Ka bij zuur en Kb bij base.
o HH-vergelijking voor oplossing met geconjugeerd zuur-base koppel (buffer)
Meeste verandering in dissociatiegraad en dus lading bij pH verandering van pKa 2
Sterkste buffer als pKa bufferzouten dichtst bij gewenste pH
Plak de ‘te kennen pKa’ lijst op bijv. je wc deur
14-07
4
, WC opdracht 1
14-07
4
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