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The cornflour 'bomb'

Description

Cornflour is sprayed into the flame of a candle burning inside a large tin can with the lid on, resulting in a small explosion.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
the-cornflour-bomb



Apparatus Chemicals

Safety screen

Eye protection for teacher

Large coffee tin (500 g catering size) with metal lid (Notes 1 and 2)

Glass funnel, small (2 – 3 cm diameter)

Rubber bung (13 mm), one hole

Candle, short piece, or nightlight

Pipette filler, rubber bulb (about 50 – 100 cm3) type

Rubber tubing, short lengths, to join pipette filler to funnel stem

Wooden splint and matches to light candle

Cornflour, dry, a few grams required for each demonstration

Refer to Health & Safety and Technical notes section below for additional information.

 







Cornflour is sprayed into the flame of a candle burning inside a large tin can with the lid on, resulting in a small explosion.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.