Pupil performing titration

Pupil performing titration

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: MODEL RELEASED. Pupil performing titration. Schoolgirl dripping measured volumes of an acid from a burette (down centre). The conical flask (bottom centre) contains a measured volume of an alkali and the indicator methyl orange. As the acid & alkali mix they change the pH of the solution, resulting in a change in the indicator's colour. This reaction has gone beyond its end- point, resulting in an excess of acid in the conical flask. This has caused the methyl orange to change colour to pink.

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Keywords: acid, apparatus, base, burette, chemical, chemicals, chemistry lesson, child, clamp stand, conical flask, equipment, experiment, female, girl, indicator, lab, laboratory, methyl orange, neutralisation, neutralise, neutralising, neutralization, neutralize, neutralizing, ph, pupil, safety glasses, school, schoolchild, schoolgirl, science education, titration

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