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14_REDOX_titrations-page3 - over titration Ecell...

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buffer region over titration equivalence point E cell percent titration Unlike acid/base titrations, we really can’t do much with this region. While some Fe 3+ must be present, we can only guess what the concentration is. No Ce 4+ or Ce 3+ are present, so we don’t have a complete reaction. Between 0% and 100% titration, we can use the Nernst equation for Fe 2+ /Fe 3+ . E Fe = 0.771 - 0.0592 log There is no significant level of Ce 4+ to work
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