What we are doing today is shown from below step:
1)Wear safety goggles and lab apron
2)Otain 1/3 solution in each four test tubes
3)Place a clean medicine dropper in each test tubes and set it in the test tube rack
4)Draw a grid as it shown in the lab book (P.19) on our note
5)There will have six different combination on each cell of grid
6)Record and make comments in your tube
7)Clean up
8)Wash your hands thoroughly with soap and water
Chemical change:
-New substances are prodused
-irreversible . Ex. burning anything, cooking
Physical change:
-No new substance is formed
-chemical composition does not change
-reversible Ex. Melting point, boiling point
Through these conditions from above between Chemical and Physical change, we can determind what kind of change does the matter is happening by those conditions.
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