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Acid-base titration

Acid-base titration

A500/0349

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Credit

MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY

Caption

Acid-base titration. Image 2 of 3. Titrations are a method of volumetric analysis, in which a volume of one reagent is added to a known volume of another reagent until an end point. This end point can be measured by using an indicator, a substance that changes colour depending on its environment. This reaction is an acid-base titration, and the indicator used is methyl orange. The solution in the conical flask (bottom) has reached the end point, between pH 3.1 and 4.4. For a sequence showing the change in colour at the end point, see images A500/348-350.

Release details

Model release not required. Property release not required.

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