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Science Experiment from the RMSC
Rubber Chicken ExperimentWkids

Materials Needed:
cooked chicken leg
quart (liter) jar with lid
white vinegar (5%)
adult helper

Procedure:

Ask an adult to cut as much meat off the chicken leg bone as possible.

Examine the flexibility of the bone by trying to bend it with your fingers.

Put the bone in the jar and cover the bone with vinegar.

Secure the lid on the jar.

After 24 hours, remove the bone from the jar and examine the flexibility.

Replace the bone in the vinegar.

Examine the bone for flexibility each day for 7 days.

Results:

The flexibility of the bone increases daily. At the end of the test period, the bone feels very rubbery.

Why:

Vinegar, which is an acid, reacts chemically with the bone. It removes the calcium compounds in the bone.