Examples of Azeotropes
Proportions are by weight.
- nitric acid (68%) / water, boils at 120.5°C at 1 atm (negative azeotrope)
- perchloric acid (28.4%) / water, boils at 203°C (negative azeotrope)
- hydrofluoric acid (35.6%) / water, boils at 111.35°C (negative azeotrope)
- ethanol (96%) / water, boils at 78.1°C
- sulfuric acid (98.3%) / water, boils at 338°C
- acetone / methanol / chloroform form an intermediate boiling (saddle) azeotrope
- diethyl ether (33%) / halothane (66%) a mixture once commonly used in anaesthesia.
- benzene / hexafluorobenzene forms a double binary azeotrope.
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