Calcium Metal: Can you please tell me how I can safely dispose of a very small amount of Calcium metal, which has not been used for a long time.

Calcium Metal: Can you please tell me how I can safely dispose of a very small amount of Calcium metal, which has not been used for a long time.
Lightning in a test tube: I have a teacher who is planning on performing the 'lightning in a test tube' demonstration in the school lecture theatre.
Portable Bunsen burners: In August 2013, a Qld Dept Education Health and Safety Consultant advised us that the Australian Gas Association (AGA) and Qld Petroleum and Gas Inspectorate have decided t
Ammonium nitrate: Hi, Has anyone else had any trouble with ammonium nitrate absorbing water? Mine has become a clear mixture of liquid and crystals.
Disposal of products of sodium thiosulfate and hydrochloric acid: Risk assessment (thio
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 (PTC) paper used in genetics: Are we still allowed to pu
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.