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[Chemical Knowledge]：How to distinguish between toluene and ethylbenzene

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How to distinguish between toluene and ethylbenzene? This is a question that requires careful observation and understanding of the chemical properties. Toluene and ethylbenzene are both common chemical raw materials and dangerous chemicals. It is very important for chemical workers to distinguish them. In general, we can distinguish by physical properties and chemical properties.

we can distinguish them by their physical properties. Toluene and ethylbenzene are both transparent liquids at room temperature, but their boiling points and densities are different. Toluene has a boiling point of 111°C and a density of 0.87 g/mL, while ethylbenzene has a boiling point of 136°C and a density of 0.86 g/mL. By measuring the boiling point and density, we can tell whether they are toluene or ethylbenzene.

we can distinguish them by their chemical properties. Toluene and ethylbenzene will have different chemical reactions under different conditions, which is a characteristic that we can use. For example, under the action of chlorine, toluene will undergo chlorination reaction to produce para-and ortho-chlorinated products; while ethylbenzene will produce meta-and para-chlorinated products. By chlorination of it, we can distinguish between toluene and ethylbenzene.

In addition to the methods described above, there are other specific experimental methods that can help us distinguish between toluene and ethylbenzene, such as chromatography and infrared spectroscopy. Different methods have different sensitivity and accuracy, we can choose the appropriate method to distinguish according to the actual situation.

In short, the distinction between toluene and ethylbenzene requires us to have a certain knowledge of chemistry, as well as experience in experimental operations. By observing their physical and chemical properties, we can accurately distinguish between toluene and ethylbenzene. This is very helpful for our operation in chemical production and experiment.

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