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6. Zuren en basen

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Zuur-base indicator<strong>en</strong><br />

• Broomtimolblauw: geelkleurig organisch zuur<br />

Geconjugeerde base: blauw<br />

• C 27H 27Br 2O 4S-OH (geel) + H 2O<br />

H 3O + + C 27H 27Br 2O 4S-O - (blauw)<br />

• Le Châtelier: + H 3O + ⇒ ev<strong>en</strong>wicht links (geel)<br />

• Omslaggebied : pH 6,0 → 7,6<br />

• Universeelindicator: m<strong>en</strong>gsel meerdere kleurindicator<strong>en</strong><br />

met verschill<strong>en</strong>de omslaggebied<strong>en</strong><br />

• Methylrood: 4,8 (rood) < omslag < 6,0 (geel)

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