Lab safety rules dictate that one must tie back long hair. Rosemarie Hansen learned the hard way when an open flame turned ...

For the demonstration in the video below, [F-J] dangled a steel ball from a chain into a Bunsen burner flame and dunked it into 150 ml of room-temperature water. After a nice long toasting ...

The leaf on the right shows a positive test for starch in the areas ... heating to boiling point if using a naked flame. Do not heat over a Bunsen burner. Use a beaker of hot water as a water ...