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burette  A method used to find the concentration of an acid or an alkali. Typically a burette is filled with an acid of unknown concentration which is slowly (drop by drop) added to a known volume of an alkali of a known concentration, mixed with an indicator (such as phenolphthalein). The volume of acid need to neutralize the alkali in the flask can be used to calculate the concentration of the acid. | In chemistry, a piece of apparatus, used in titration, for the controlled delivery of measured variable quantities of a liquid. |
| It consists of a long, narrow, calibrated glass tube, with a tap at the bottom, leading to a narrow-bore exit. |
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