1. Init 5/1/2014 by Daniel Barnes (based on a lab used for years previous to that date)

2. SWBAT...... interpret energy diagrams for chemical reactions.... calculate molar masses.

3. CuSO 4 5H 2 O = copper sulfate pentahydrate If you heat copper sulfate pentahydrate crystals, they will give off water molecules into the air and become anhydrous copper sulfate. However, if the crystals are large, lots of water molecules are trapped deep inside the crystals, so they can’t escape into the air as easily. CuSO 4 5H 2 O + energy  CuSO 4 + 5H 2 O water vapor 

4. If you grind the pretty blue crystals up with a mortar & pestle, they will turn into a powder. Now, the copper sulfate is made of smaller particles, so it has more surface area. Now, it will be easier for H 2 O molecules to escape from the crystals and fly into the air as water vapor.

6. Empty tuna can = c. 26 g or so If your “tare” mass for #1 is very different from this, you might have measured it incorrectly.