I'd like to say that I have lost trust in this site because I just completed this and clicked publish and it did not publish; nor did it save.
Here it goes again...
Twice, now, this has happened.
In this lab, the procedure was the following:
-Observe the green stuff without reaction.
Add 30 mL of water to the green stuff and observe.
Place a drop of this mixture on aluminum foil and observe.
Tera up the foil into the green stuff and observe.
At first, the green stuff was green and in a solid powder form. When mixed with the water, it glowed green, and dissolved into a liquid. When it was dropped onto the foil, it fizzed and released a gas, it turned dark, and dried up into a solid. When all of the foil was in the green stuff and water mixture, all of the liquid fizzed and dried up (the same reaction as above).
I know if a change is chemical if the green stuff changes its state of matter, if it fizzes, or if it burns. An example of a chemical change was when it fizzed after being exposed to the foil. A physical reaction happens when it changes shape, but not it's chemical make up. Solids have a definite shape, and the molecules are tightly packed. Liquids and gasses, however, do not have a definite shape, and the molecules are free to move.
This relates to what we have been doing in class because we are learning about compounds, elements, and mixtures, and how they relate and react to each other.
I would like to see how copper chloride reacts when it is ignited because the wikipedia page says that is glows a bright blue, and that sounds cool.
No comments:
Post a Comment