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Topic: use of indicator in titrations  (Read 2811 times)

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Offline cuongt

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use of indicator in titrations
« on: February 24, 2007, 04:06:33 AM »
im just wondering y is it important to only use a few drops of indicator in titrations. is it because the end point would change or would it be the colour.
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Offline Borek

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Re: use of indicator in titrations
« Reply #1 on: February 24, 2007, 04:11:43 AM »
Both. Plus in the case of one-color indicator (like phenolphthalein) titration results depend on the indicator concentration.
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Offline Yggdrasil

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Re: use of indicator in titrations
« Reply #2 on: February 24, 2007, 12:40:29 PM »
Most indicators are themselves weak acid/bases, so if their concentration is non-negilgible, they can affect the endpoint of the titration.
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