5. During a slow distillation of methanol and water, the heater was set to 100 C., and the following observations were made while reading the thermometer: The temperature rose steadily and there were no droplets collected until at 65°C., where a fraction was collected at constant temperature. After this, the droplets stopped for a while even though heating was continued. Afterwards, the temperature dropped to 50°C., although no droplets were collected. Even after heating for an hour, the temperature did not increase, and no drops were collected, even though there was considerable liquid left in the distilling flask. What is the composition of the distillate at 65°C.? Why did the temperature drop to 50°C.? What is the liquid left in the flask?

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5. During a slow distillation of methanol and water, the heater was set to 100 C.,
and the following observations were made while reading the thermometer: The
temperature rose steadily and there were no droplets collected until at 65°C.,
where a fraction was collected at constant temperature. After this, the droplets
stopped for a while even though heating was continued. Afterwards, the
temperature dropped to 50°C., although no droplets were collected. Even after
heating for an hour, the temperature did not increase, and no drops were
collected, even though there was considerable liquid left in the distilling flask.
What is the composition of the distillate at 65°C.?
Why did the temperature drop to 50°C.?
What is the liquid left in the flask?
Transcribed Image Text:5. During a slow distillation of methanol and water, the heater was set to 100 C., and the following observations were made while reading the thermometer: The temperature rose steadily and there were no droplets collected until at 65°C., where a fraction was collected at constant temperature. After this, the droplets stopped for a while even though heating was continued. Afterwards, the temperature dropped to 50°C., although no droplets were collected. Even after heating for an hour, the temperature did not increase, and no drops were collected, even though there was considerable liquid left in the distilling flask. What is the composition of the distillate at 65°C.? Why did the temperature drop to 50°C.? What is the liquid left in the flask?
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