Expert Film: Pharmacist Lizzie Allum explains how mass is conserved.

This video explains the principle of conservation of mass, highlighting how matter is neither created nor destroyed in chemical reactions, only rearranged. It illustrates this concept through pharmacy examples like making ointments and tablets, emphasising potential losses and inefficiencies that can affect the final quantity of product. Learners will understand the importance of precise measurements and considering reaction limitations in practical applications.