Catalysts Connect Starter: Name as many compounds as you can: 27 November, 2018 Catalysts Key Words Energy Reactions Catalysts Rate LO: to recognise the role of catalysts in reaction and their importance Starter: Name as many compounds as you can: One point for the name one for the formula Extension: Name some industrial chemical processes? 1

What do catalysts do? They speed up reactions. But they don't get used up in the reaction.

Demo of elephants toothpaste Example: Hydrogen peroxide (H2O2) This chemical breaks do to form water and oxygen It happens at room temperature but catalysts make it go faster! Write a word equation for this reaction Extension: can you produce a balanced symbol equation? watch this if you can’t do it in class Note: test for oxygen

Practical This is an investigation to see how different catalysts affect the rate of a reaction. Measure 20ml of 10vol hydrogen peroxide into a 100ml measuring cylinder Add 3ml of washing up liquid Add either some potato pieces or manganese dioxide (1 spatula) Measure how much foam is produced per second for 30 seconds (you decide how) Show the results as a graph and write a conclusion

How do they work? They basically lower the amount of energy needed for a reaction to happen. If it needs less energy to get started it happens faster

When are the used? In many industrial processes. Because less energy is used they save money and fuel. Examples include the plastics industry and making fertiliser.

Exit ticket: copy and complete One new thing I learned was: One thing I don’t understand is: One thing I enjoyed was: One thing I want to know more about was: Show to the teacher before you put your book away