1. Chemical Reactions Lab Results Investigative Science November 18 th, 2011

2. Station 1  What you used: –Ammonia and Alum solution  What you should have seen: –White, cloudy, gel precipitate  Was this a chemical or physical reaction??

3. Station 2  What you used: –Powder Tide© and water (H 2 O)  What you should have seen: –Gives off heat, EXO-thermic reaction  Was this a chemical or physical reaction??

4. Station 3  What you used: –Epson solution and ammonium solution  What you should have seen: –Cloudy, white precipitate  Was this a chemical or physical reaction??

5. Station 4  What you used: –Epson salts (solid crystals) and H 2 O  What you should have seen: –Feels colder, ENDO-thermic  Was this a chemical or physical reaction??

6. Station 5  What you used: –Calcium chloride, baking soda, water  What you should have seen: –Creates a gas, releases heat  Was this a chemical or physical reaction??

7. Station 6  What you used: –Vinegar and water (H 2 O)  What you should have seen: –Nothing  Was this a chemical or physical reaction??

8. Station 7  What you used: –Ammonium and phenothlalene  What you should have seen: –Pink color change  Was this a chemical or physical reaction??

9. Station 8  What you used: –Yeast and hydrogen peroxide (H 2 O 2 )  What you should have seen: –Feels warm when mixed, EXO-thermic reaction (energy is going INTO the system)  Was this a chemical or physical reaction??

10. Station 9  What you used: –Potassium iodide (KI) and copper (II) sulfate (CuSO 4 )  What you should have seen: –Precipitate  Was this a chemical or physical reaction??

11. Station 10  What you used: –Potassium permanganate (KMnO 4 ) and glycerin  What you should have seen: –Fire is created, gas is emitted  Was this a chemical or physical reaction??