Rookie Mistakes - Cleaning

Mistake	Check the mistakes you have made	Number of rookies who have done this
While cleaning beakers with stir bars inside and then pouring the solution into the sink along with the stir bar		11
Rinse flask with acetone to clean off gunk immediately before starting Grignard rxn.		3
Accidentally mixed Sulphuric and Nitric acid with methanol whilst trying to "clean" a flask		2
While washing glassware, combined saturated KOH/EtOH waste with concentrated HNO3 waste.		2
Didn't ask if waste container in waste hood's illegible label read Aqueous or Aqua regia and then pored in water/THF mixture resulting in blowing up waste hood and melting paint off nearby steal door, no injuries to self or others.		1
sublimed t-BuOK, threw unsublimed solid in solid waste, solid waste catches on fire...twice		1
Washed your gloveless finger with concentrated sulphuric acid because it was in an unlabeled beaker and looked like water		1
Poured conc acid waste into bleach waste not thinking about the cloud of Cl2 gas about to be created		1

Other Rookie Mistakes

Equipment Reagents Setup Quenching Rxns Workup Chromatography

Distillation Spectroscopy Cleaning Record-Keeping Accidents Miscellaneous