A practical essay on chemical re-agents of tests / by Fredrick Accum.

  • Friedrich Accum
Date:
1816
Catalogue details

Licence: Public Domain Mark

Credit: A practical essay on chemical re-agents of tests / by Fredrick Accum. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    phuric and nitric acid, alter the resin when digested with it even for a considerable time, but lets this substance fall again apparently unaltered by the admixture of water, it affords a very useful re-agent in the complicated analysis of vegetable substances. XIII. OXALIC ACID. The oxalic acid is a test in chemical ex ] periments to determine the presence of lime in liquids, in whatever combination this earth exists ; for it attracts lime with greater force : than any other acid, and therefore is capable of decomposing compleatly all the known cal- i careous salts. The oxalate of lime is insolu- ble in water; so that when this acid is added 1 to a solution containing lime, a white precipi- tate of oxalate of lime falls down, from which, when collected, washed, and dried in a mode- rate heat, the actual quantity of lime may be readily inferred. But oxalate of ammonia is a better test for lime. See Oxalate of Am- monia.
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