Some familiarity with the concept of periodicity is needed for the student to obtain full benefit from the lab. The follow-up discussion is very important. Go to Top Hazards Phosphorus is extremely toxic and flammable. Concentrated nitric acid causes burns. The fumes of phosphorus oxide, sulfur oxide, barium oxide and nitrogen oxide are toxic.
Sodium peroxide can react explosively with water.
Only the instructor should handle sodium peroxide. Wear gloves when handling phosphorus. Be certain that all of the phosphorus placed in the spoon is oxidized. Be certain that all of the sodium peroxide sample removed has been reacted. In case of contact with concentrated nitric acid, immediately flush eyes or skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.