Formation of crystals: Hi.
Ammonium nitrate: Hi, Has anyone else had any trouble with ammonium nitrate absorbing water? Mine has become a clear mixture of liquid and crystals.
Risk assessment (thiosulfate): Do you have a RA for the reaction of 0.1M sodium thiosulfate with 2M hydrochloric acid, especially the cleaning up and disposal.
Disposal of empty helium cylinders: From browsing Google, there seems to be a lot of confusion on how to dispose of empty helium gas cylinders.
Phenylthiocarbamide paper: Hi, Are you still allowed to use phenylthiocarbamide paper?
Disposal of silver nitrate solid: I have collected silver nitrate solution in a winchester and decanted it off, ready to evaporate the solution, so that I am left with just the solid waste.
Science drug lab equipment: Apparently school laboratories need a list, by item and quantity, of anything that could be targeted by a 'drug lab' break in.
Use of a spirometer: One of our teachers would like to use a spirometer in class. The spirometer requires the user to breath in rather than blow air out. Are we allowed to do this, if we have dis
Chemical disposal (chromium): I have a small amount of potassium dichromate and potassium chromate to be disposed. What is the best way to do this?
pH Probe: Can anyone suggest a pH probe with data logging function/capabilities for use with our senior science groups?