This #Halloween, we’ve put together this practical to teach your pupils science... and scare them silly!
Bring a frightful fizz to your lessons this Halloween with our Monster Vomit experiment!
Aim: Investigate the rapid decomposition of hydrogen peroxide and observe how catalysts and soap produce dramatic foaming
Safety: Eye protection, gloves and lab coats must be worn. A thorough risk assessment should be completed by teacher or technician, before beginning this practical.
Measure out 50ml hydrogen peroxide solution using the measuring cylinder, then pour into the conical flask
Measure out 5-10ml washing up liquid using the second measuring cylinder. Pour this into the conical flask and swirl gently
Add a small amount of food colouring, then swirl again
Mix yeast with warm water in a beaker, stir gently using a stirring rod
Quickly pour yeast mixture into the conical flask and step back!
Name the gas produced during the reaction
Describe the reaction – think about the speed of the reaction, and whether there is a change in temperature (touch the outside of the conical flask)
In this experiment, yeast acts as a catalyst. Explain how catalysts work to speed up a reaction.