Friday, July 17, 2015

Summer Science - AIG Properties of Atoms and Molecules Units 4 and 5

I respectfully ask that you not pin pictures of my children to Pinterest. Thank you!

For unit 4, we made a fire extinguisher in a jar, tested the effects of temperature and surface area on reaction rates, observed the effect of catalase (an enzyme),
potato in hydrogen peroxide - making bubbles
observed the effect of heat on an egg cooking,
turned these into egg salad after a little more cooking - yum!
measured heat released by oxidation,
This probably would have worked better with a smaller jar. I used this big one because the only thermometer I had was my candy thermometer. That also made the results less clear. Tip: use a small thermometer and small jar.
In unit 5, we made our own acid/base indicator using cabbage and then tested for acids,
lemon juice, vinegar, clear soda, milk, and saliva
This experiment would have been better if our indicator had been made from purple cabbage instead of red cabbage. We didn't get the right colors when we added the indicator to our items.
We did a displacement reaction (which ate through one of the pennies we used), and tested for bases,
Since we skipped lesson 24, our last experiment for this unit was acid/base titration.
Don't they just look thrilled with this one? :)

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