2013年2月20日水曜日

Let’s dissolve an eggshell

Let’s dissolve an eggshell in vinegar water.


















It takes a couple of days until the unshelled egg.
Can you see the air bubble around the egg?


1 day later, the eggshell is dissolved a little.

5 day later, the eggshell is dissolved completely.


Awesome result! The eggshell was dissolved completely.We can observe the beautiful transparent semipermeable membrane.

Look the photo which compared with a raw egg.
The transparent egg was bigger.
When we observe it through the light, the beauty was the best!


Hope you and your kids enjoy the exam!