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National Chemistry Week - Experiments - Bones in Knots
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The Aim:
to tie chicken bones in knots with the help of chemical
changes
What you will need:
- 1 large jar
- small, long, thin chicken bones, washed and clean
- enough vinegar to cover the bones
What to do:
Put the chicken bones in the vinegar for 3-4 days.
Remove the soft bones from the solution and tie the
bones in knots.
Set the bones aside and they will dry and harden.
![[IMAGE OF BONES IN KNOTS]](images/bones.gif)
The vinegar chemically reacts with the bones so that they
soften. The bones will then chemically react again with the
carbon dioxide in the air and this will cause the bones to
harden. This is a fun trick.
Calcium is what keeps our bones hard. Bones will get soft if
they start to lose calcium. This can happen when a person has
nutritional deficiencies or a health problem.
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