This demonstration illustrates the importance of enzymes in the human body. Enzymes catalyze many important chemical reactions in the body. This demonstration is a visual example of how the enzyme catalase, which is present in all cells, but in highest concentrations in the liver, breaks down hydrogen peroxide into water and oxygen gas. Hydrogen peroxide, which is a potentially damaging oxidizing agent, is a by-product of certain cellular reactions. It must be broken down quickly because it could damage and destroy cells.
In this inquiry, students are shown how to do a simple titration with basic apparatus, using a dropper instead of a burette. This enables students to do several quick titrations using different... read more
Categories: Teacher Demonstration
This classic demonstration involves conducting flame tests of metal salt solutions. The colour of each flame test can be used as a qualitative test to detect the presence of the corresponding metal... read more