Lab Day

Lab Day

6.11.2017 at 4:28 pm
 

Chemistry is no magic, even if it seems like it sometimes. Grades seven, eight and nine were close to the action – but not too close. Of course, rubber gloves were mandatory.

What sorts of things can happen when mixing together two seemingly harmless liquids! Suddenly there is seething and bubbling and the two liquids become a foam that expands and expands until it wells over the rim of the test tube. But that is not all. After a while the foam becomes a hard mass. Magic? No. This is how you make expanding foam, the kind you find in our houses as insulation so even during this cold time of the year it stays cosy and warm inside and in summer nice and cool.

Of course, it matters which liquids you mix together. If you use the liquids of a couple of other little bottles you get a soft mass that pulls strings when dipping in a glass rod. Voilà: polyhexamethyleneadipamide. You don’t know this? Yes, you do. It’s nothing different than nylon which we use for our clothes.

Everyone was very excited about the result of two mixed materials. After half an hour under a lamp they did not only become transparent but extremely solid. Plexiglass! Who knows what magic our junior chemists will perform in the future and what fascinating new material will be created! Today the chemistry was right for sure.

Words of Wisdom (with Rav Baron)

“And thy seed shall be as the dust of the earth, and thou shalt spread abroad to the west, and to the east, and to the north, and to the south. And in thee and in thy seed shall all the families of the earth be blessed. ” Bereshit 28, 14

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