Last week during Natural Sciences our Grade 8s were learning about elements and compounds and being introduced to chemical bonds and chemical reactions. We used simple electrolysis and heating to demonstrate some decomposition reactions like this one showing the thermal decomposition of potassium permanganate.
Using a bunsen burner to heat potassium permanganate (KMnO4) results in a chemical reaction that produces potassium hypomanganate, manganese(IV) oxide and oxygen gas. A test for oxygen gas is done using a glowing splint. The glowing splint ignites in the test tube in the presence of a high concentration of oxygen.
(video credit to Dr de Roo)
The Natural, Life and Physical Sciences subjects have strong practical contexts which we embrace and encourage at Pinelands High School. We have a dedicated lab technician who ensures that lab work enhances learning, is innovative, fun and done more and more regularly.