why must water be flowing through the condenser before you begin heating a reaction mixture? select one: the aldol condensation reaction in part 1 requires a condenser to increase the rate of reaction the amount of chemical vapor will begin increasing as soon as the reaction mixture is heated, and having a cold condenser minimizes vapor loss from the reaction mixture it is easier to set up the condenser than to set up the heating mantle, and you should always do the easier tasks first when setting up chemical reactions the water must be run for enough time before it will be cool enough to condense vapor