Chemical Reaction Lab

9/21/2005

Observations:

System	Observations
Dry Copper Chloride Dehydrate	Teal crystals, clumping together, very soft.
Copper Chloride Dehydrate in water	Turns very radiant green, rich grass green color. Water stays clear, slightly cloudy.
Copper Chloride Dehydrate solution, stirred	Particles completely dissolve, water becomes a darker sky blue, and stays completely transparent. Cloudiness goes away.
Copper Chloride Dehydrate solution + Al foil	The aluminum caused bubbling, foil turns maroon, or rusty brick red color, disintegrating, and clouding the liquid. Liquid turns grayish purple. Particles of rust colored foil (copper - color) remain at the bottom.

Initial Temperature of solution: 22°C

Maximum temperature with aluminum foil: 37°C

Analysis:

1. I don’t think any are interpretations rather than observations…

2. Lists:

a) 1 – Teal color, 2 – clumping together, 3 – very soft.

b) 1 – Rich, radiant, grass green color, 2 – water stays clear, but slightly cloudy.

c) 1 – Particles dissolve, 2 – water becomes a darker sky blue, 3 – water stays transparent, 4 – cloudiness goes away.

d) 1 – Aluminum caused bubbling, 2 – foil turns maroon or rusty brick red color, 3 – foil disintegrates, 4 – foil clouds the liquid, 5 – liquid turns grayish purple, 6 – particles of rust or copper colored foil remain at the bottom.

None of these observations are quantitative.

3. I would expect my observations to match those of my classmates, because they were doing the same experiment, and probably observed very similar patterns, colors, and chemical activity. Interpretations, on the other hand, are like an opinion, and everyone’s interpretations of the experiment can and probably will differ.