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distilled water


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Water purified by distillation so as to free it from dissolved salts and other compounds. Distilled water in equilibrium with the carbon dioxide in the air has a conductivity of about 0.8 × 10−6 siemens cm−1. Repeated distillation in a vacuum can bring the conductivity down to 0.043 × 10−6 siemens cm−1 at 18°C (sometimes called conductivity water). The limiting conductivity is due to self ionization: H2O ⇌ H++OH. See also deionized water.

Subjects: Chemistry.


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