Reflux condensers are used to cool down the vaporized solution before it is returned to the flask with a flat bottom.
Reflux is a lab method for heating a mixture without losing a lot of solution. Refluxing a combination has the effect of accelerating and/or inducing the reaction. Due to their low boiling points and potential for ignition, organic solvents like benzene are often utilized in a reflux arrangement.
Refluxes and distillations both use very similar apparatus configurations, but condensates from refluxes re-condense into the same container while those from distillations are collected in a different container. Heating a reaction speeds it up because a lower activation energy results from the presence of additional energy in the system. To achieve the greatest feasible product-to-reactant ratio, solutions are refluxed for a predetermined period of time.
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