Question

1.In chemistry, what does the term “reflux” mean when heating a liquid? How is that different from boiling?

2.When the condenser is set up, why is the coolant water set to flow gently through the tubing instead of at a hard, rapid flow?

3.When heating, why do you wait to start your timer for the reaction until it has started to reflux?

4.Why is the filtration set-up rinsed with hexane before use?

Answer 1

reflux apparatus, then 1. At first we take a look at the things will get cleares! water circulation out condenses Reflux apparaturs wates circulation in - liquicl round bottom flask (rib. healing In normal boiling we have evaporation from all over the vessel and eventually after some time, all liquid in the r. b will be ranished. 1. While in a reflux, the liquide starts to boil up from all over the vessel and goes up, but at reaching the Condenses , by the cold water circulation in the vapour gires away betent head to the cold weates, which then goes out, condenses and compes back to the ressed.. Thus, in reflux the liquid boils, condenses & conces back to the vessel, while in boiling it just evaporates and empty the vessel. 'Reflux is like rain, while boiling is just going up but no rain.

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