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Why is ‘‘distillation’’ a purifying technique?
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- What does a refractometer reading of 2 mean when distilling ethanol?What is the function of a desiccant in a set-up of volatilization gravimetry? To remove nitrogen from the sample To remove sulfuric acid from the sample To remove water vapor from the sample To remove carbon dioxide from the sampleWhat is an effective way of preventing irregular ebullition or bumping of the mixture during distillation?
- Experiment: UV-Vis Spectrophotometry and Beer’s Law Absorption of Light of Dyes in Beverages Explain the purpose of using a blank solution in this experiment.Why is the separation of two liquids better if the distillation is carried out at a slow rate rather than at a fast rate?What is the purpose of the blank? Why is distilled water used as the blank in this experiment?
- What kind of sample cleanup does solid-phase extraction accomplish in the analysis of caffeine and theobromine in chocolate?Describe the basis of operation of the following separation methods. i. Precipitation ii. Distillation iii. ExtractionWhat characteristics must a substance possess for it to be separated from a heterogeneous mixture by steam distillation?