Stoichiometric Relationships

Activity 1 - Phlogiston

Topic 1.1 - Introduction to the particulate nature of matter and chemical change.

NOS statement 2.3 - "Occasionally, however, a new theory will radically change how essential concepts are understood or framed, impacting other theories and causing what is sometimes called a 'paradigm shift' in science."

Time: 20 min.

Task​: Till late 1700's phlogiston theory has explained combustion well. Watch the video on the right and with a simple experiment explain with a balance and the combustion of a piece of magnesium can disprove the phlogiston theory?

Reference: Chemistry Subject Guide, First Examination 2016,IBO