GCSE Chemistry - Conservation of Mass #26

The video explains the principle of conservation of mass in chemical reactions, emphasizing that mass is conserved as atoms are neither created nor destroyed. It illustrates this with examples, showing how to balance equations by comparing relative formula masses. The video also discusses exceptions when gases are involved, which can lead to perceived changes in mass. It highlights the importance of conducting experiments in sealed containers to ensure accurate mass measurements, as gases can escape or enter from the air, affecting the results.

What does the conservation of mass principle state in a chemical reaction?

How can you demonstrate that mass is conserved in a chemical reaction using sodium and chlorine?

What happens to the mass measurement when a reaction involves a gas?

Explain how conducting an experiment in a sealed container affects the measurement of mass.

What should you do to avoid discrepancies in mass measurements during a chemical reaction?