Sulfuric acid - going brown: Would you please tell me why concentrated sulfuric acid goes brown?
Endothermic reaction disposal of products: How can I dispose of the products of the reaction between Ammonium thiocyanate and barium hydroxide?
Broken Max Min Thermometer: We have some max min mercury thermometers here, and yesterday one of them was broken by a cleaner. The broken thermometer gives off an overpowering odour, it was e
Recommended Chemicals for secondary Schools: I have to order new chemicals for our school in QLD, but the following chemicals are not in the list "List_of_recommended_chemicals-18March-2016.
Microscope servicing: Can any one recommend a microscope servicing company/person who would do the Gold Coast area please?
Calcium Carbide: My teachers are wondering whether there are any restrictions on us storing and using Calcium carbide for pracs here at school?
Mitosis in onion root tip: Are there alternative stains for mitosis in root tips please? It needs to be inexpensive (I've been quoted $150 for 5 gm orcein, including postage), not too hazardous,
Employment: Are there any standards or recommendations regarding the number of hours a lab technician should be employed?
Safe concentration of HCl for Year 8 students to use?: A year 8 textbook has an activity which includes an example for a colour change (blue litmus paper with HCl added to it).
- Year 8 > Science Understanding > Chemical Sciences > Chemical change involves substances reacting to form new substances > ACSSU225
Balloons: I haven't heard of any issues but we have a parent who is concerned with regards to balloons and latex and the powder residue in them.