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Activity

Coke and mentos

Summary: 
Drop mentos into coke to produce a fountain of foam.
Science content (2016 curriculum): 
Chemistry: States of Matter, Properties of Materials (K-7)
Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6)
Lessons activity is in: 
Materials: 
  • diet coke, 2l bottle
  • mentos, one packet of mint (the fruit flavour ones are coated and don't work)
Procedure: 

Open the bottle of diet coke and place in an open space.
Move the students back.
Dump the mentos in the coke as fast as possible (can use a paper funnel).

A giant fountain of foam is produced.

The mentos have a very bumpy surface that provides a place for bubbles of carbon dioxide to come out of solution. It does so rapidly, generating a mass of bubbles which stay around long enough to form a foam that geysers out of the bottle.

http://en.wikipedia.org/wiki/Diet_Coke_and_Mentos_eruption

Grades taught: 
Gr K
Gr 1
Gr 3
Gr 4
Gr 5
Teacher: 
Ingrid
Teaching site: 
General Gordon Elementary Science Club
ingridscience afterschool
JEMZ+ After school science
Activity originally developed and delivered: 

Gordon Elementary Science Club