How to make pressure in fractionation destillation become 5 mmHg??

Question

what should i do to manometer,fractionation destillation`s column and vacuum to get 5mmHg pressure inside the column of fractionation destillation??

thank u for your help

Answer 1

Connect a vacuum pump to the top of your column, then a manometer in a 'Tee' off the vacuum line.  Then turn on the pump and adjust until the manometer until it reads 5 mmHg.